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Pick-up trucks. Gas vs diesel

I

Illinois deere

Member
What do you guys think? I currently have a 2003 Chevy 2500hd with a duramax and about 130000 miles on it. I am looking at a 2011 Chevy 2500hd with a 6.0L gas and about 72000 miles on it. Both are 4 door 4wd trucks. Besides light duty farm work like pulling a 150-200 bu. gravity wagon, I have a bumper hitch camper that weighs about 7500 lbs. I know how the diesel does. Comparitively, how do yall think the gasser will do?
 
If you LIKE the pulling torque of the diesel, you won't like the gas. Only way the gas will pull much weight is downshifted, and engine speed revved up. If you PULL weight often, stay with diesel, if not then gas will do the job, just not as easy.
 
Same comment as Dieseltech.
I will add that I would keep the Diesel myself, but That's me.

I bought my last new truck in 99 don't intend to buy anymore.

Tom
 
I have just partially retired my 2007 dodge 2500 Cummins. She has 260,000 miles but is still in great shape. I don't need to have a 3/4 ton 4wd diesel pickup as my daily driver. We bought the wife a new vehicle, and I took over her 2007 jeep grand cherokee as my daily ride. Do you need a pickup every day ? My truck is still on the road but will only be used for pulling our camper, our gooseneck trailer, and when I actually need a truck. Our insurance also offers a discounted rate for vehicles with limited use. I don't know how much you need a 3/4 ton truck daily. Maybe you could do like I did. Drive a cheaper vehicle everyday and use your current truck when you need one. Just a thought. Not everyone's situation is the same. As far as gas and diesel. You will spend the same if not more in gas than you will hauling with a diesel. Gas might be cheaper but you'll use a lot more, and won't have the same pulling power. Just my opinion.
 
A programmer will allow adjustment of the shift points and reduce the hunting, shifting and reving. Not that there is anything wrong with reving, it is just rating rpms to make more power.
It's not like the engine is going to blowup of something.
Fuel bills will be a little bit higher but major repairs will be cheaper with the gasser.
 
Thanks for the reply. My situation is pretty much like yours. I have a small truck to drive to work, a low mile nice car to get around cheap, and my wife has her van. I was just looking to gain some years and about 60000 miles with a differen't truck. About the only time I need a truck is when I need the bed or to pull my camper (about 3000-4000 miles/yr. Mostly worried how it would pull the camper.
 
Personally I prefer gas for my everyday truck. I don?t sit around an let my gas truck warm up like I did the diesel. Oil changes and most repairs are much cheaper. That being said the diesel will be worth approximately twice as much when you want to sell or trade it
 
(quoted from post at 00:34:35 01/14/19) Thanks for the reply. My situation is pretty much like yours. I have a small truck to drive to work, a low mile nice car to get around cheap, and my wife has her van. I was just looking to gain some years and about 60000 miles with a differen't truck. About the only time I need a truck is when I need the bed or to pull my camper (about 3000-4000 miles/yr. Mostly worried how it would pull the camper.
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Dropping 60,000 miles would mean something if you were comparing gas to gas or diesel to diesel. I don't think it means anything in your situation. Perhaps the body on your 03 is showing it's age?
 
less power and poor fuel mileage why are you getting rid of your diesel 130k ain't nothing 300k maybe just my 2 cents
 
The 6.0 will pull, and they love their revs while doing so. Dad had a 6 liter, he pulled his 27' 5th wheel all over the U.S. with it. It got about 6-7 miles/gallon on most trips. He's not a hot rodder either, about 60 mph on the freeway pulling his 5th wheel or empty. Best he ever did with it was 13 mpg, that was empty, freeway driving. Pulled an IH combine home to Michigan from Indianapolis In, about 300 miles. Had about a 30 mph north wind on the way home. It was right at 13'4" high, like a giant wall behind the truck. I don't think the tach dropped below 3500 rpm the entire trip home, got just a touch over 4 mpg lol. Not real fuel efficient, but a 6.0 would pull what you need. Dad bought a Duramax after he sold that truck, loves it. I can't make the decision for you, just give you some points for reasoning with yourself in your decision.

Ross
 
Our camper is 32 feet plus tongue. 2 large slides. Around 7500-8500 pounds. Around here it's kinda hilly and I would not choose a gas truck to pull it. I guess how much traveling you do with it would be a consideration. If fairly flat you could get by with a gas. You wouldn't want one here though. I almost bought a gasser, probably would have been ok, but I wouldn't have been happy.
 
I have a 2016 F250 4x4 and 4 door. It has a 6.2 liter gas motor. My friend has a 2010 F250 6.7 liter diesel. 4x4 and 4 door. In other words same truck except motors. On a 350 mile trip one way. Pulling gooseneck trailers and antique pulling tractors the dollars have been within 1 dollar. The gas showed 9.1 and the diesel showed 12.9. But the cost per mile was the same! Don't know about a Chevy but my Ford will pull with a diesel, if doesn't have a controller.
 
I pull our 29ft bumper pull camper with an ?09 2500hd 4 door 6.0. It?s a fairly heavy camper, fiberglass sides and has a slide out too. Power has not been an issue, and fuel mileage isn?t too bad. Around 10 mpg unless pulling against a strong headwind.
 
I personally don't like a diesel in my pickup. I don't like the expense, noise or smell. I am not so sure I would be able to diagnose and fix it if something big went wrong with it. I have a 2500 Dodge with the v10, bought new and only has 86000 miles on it now. That's because I only use it when I need to pull or haul something, I don't commute or ride around empty with it. I always keep a mini truck, SUV or other beater around for that stuff. Yes it uses lots of gas, but it will pull anything I need it to very well. The 6.0 will probably get about the same mpg as my v10 does, which is bad ! They are good engines and do have good power though.
 
I have an 03 duramax with 250,000 miles on it and haul several heavy loads and like the diesel, I think if you are going from the duramax to the 6 liter gas and like the diesel power, you will be highly disappointed in the gas.the last gas truck I had was a 97 Chevy with 350 and automatic and haven?t had a gas truck in 15 years.
 
A gaser will have no problem doing what you want to do. Don't expect to get too good of gas mileage though. I brought a new 07 HD with a 6 liter, 4 wheel drive, extended cab, and the big 410 gear. Pulling a 10000 lb fifth wheel with a small 12 ft enclosed trailer hooked behind it I get about 7-8 mi per gallon. No problem pulling it though. 16 foot cattle trailer, 12,000 lb dump trailer, 10,000 lb flat bed will get anywhere between 9-11 miles per gallon. I'm happy with my truck but I have a small car to drive if I don't need the truck as I only use it on my small farm to haul and pull' I put 3900 miles on it last year and only have 65000 on it. I've put new brakes on it and its the only thing I've done to it, still running original tires. When I brought it I debated on the diesel for 10,000 more and am glad I went with the gaser.
 
I have a gas truck and i regret not buying a diesel all the time. Mileage is terrible compared to similar sized diesel engines, especially while towing... and the diesel actually has available torque! Don't make a choice you will regret!
 
I?ve had a few diesel trucks but any of the newer ones have just been so expensive to keep on the road that my most recent truck is a gas job. I go a little slower and fill up a little more often but I don?t drive down the road dreading the little chime as the check engine light comes on. Good luck.
 
I have 100K on my Ford, never seen check engine light, they are more expensive to fix, but do not always need it.

The Duramax that he listed is a good solid older machine.
 
(quoted from post at 06:28:14 01/14/19) I have a 2016 F250 4x4 and 4 door. It has a 6.2 liter gas motor. My friend has a 2010 F250 6.7 liter diesel. 4x4 and 4 door. In other words same truck except motors. On a 350 mile trip one way. Pulling gooseneck trailers and antique pulling tractors the dollars have been within 1 dollar. The gas showed 9.1 and the diesel showed 12.9. But the cost per mile was the same! Don't know about a Chevy but my Ford will pull with a diesel, if doesn't have a controller.
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You cannot compare a ford 6.2 to a chebby 6.0 the 6.2 will eat the chebby's lunch... I believe every thing you said :wink: a 6.2 is a hot rod feed it and be happy... The same can be said about the 6.0 but it will never keep up with a ford 6.2...
 
Just my $0.02, but I say keep your diesel, and I don’t even like a D-max.

Sorry gassers, but you’ve obviously never had a good diesel truck if you think yours will pull with a diesel. A gas truck may do the job, but it will not do it as well.

We had a 2500 Suburban 4x4 with the 6.0 several years ago. A friend had it for sale and my wife wanted something bigger than her Grand Cherokee. No way would it pull with my 12 valve Dodge. It didn’t matter if you were driving empty, downhill with a tailwind or pulling a 25’ pontoon boat, it NEVER got better than 11mpg and it drank a quart of oil every thousand miles like clockwork. Never did figure out where it went. It didn’t leak and it wasn’t burning it that I could tell.

I drive my truck at least 65 miles a day. It has a bit over 500K miles on it, never had the head off, she’s putting down 350hp and 800 ft/lb of torque and gets at least 20mpg every tank, and it will pull anything that I care to pull.

-Scott
 
you will be saying "I wish I had my Duramax". I have been driving every diesel built by GM and this Duramax is unbelievable. your 2003 with 130,000 miles I sure would not be getting rid of it. that 6.0 L is a pig on fuel. I have driven one from work. and pulling with it will be a bigger pig.
 
and I meant to say, that Duramax will go 500,000 -700,000 miles easily. Isuzu has one good engine there.
 
I had a 2016 GMC 5.3l pulled a 32' fifth wheel to South Carolina and back. 2500 miles and averaged 10 mpg. Mostly at 60 to 65 mph.
Pulls the camper way better than my 6.0 2009 did and gets better mileage.
Keep the diesel and forget the 6.0 gas hog
 
I have a 2002 super duty dually diesel and a 16 F250 SD with 6.2 gas. Dually is 6 speed manual with 4.10. Gas is 6 speed automatic with 3.73. Pulling a 14k rating trailer hauling a 6000lb pulling tractor: gas will run same speed on hills as diesel. Diesel in overdrive and loose 5 to 8 mph: gas loses no speed (70-75 mph) but may be in 4th gear at 4000 rpm. Dually at 9 to 10 mpg, gas 7 to 9. Takes some getting used to. If pulling heavier, I would stay diesel. Not because gas won't do it but because diesel will do it easier.
 
(quoted from post at 15:47:40 01/13/19) What do you guys think? I currently have a 2003 Chevy 2500hd with a duramax and about 130000 miles on it. I am looking at a 2011 Chevy 2500hd with a 6.0L gas and about 72000 miles on it. Both are 4 door 4wd trucks. Besides light duty farm work like pulling a 150-200 bu. gravity wagon, I have a bumper hitch camper that weighs about 7500 lbs. I know how the diesel does. Comparitively, how do yall think the gasser will do?
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Used to be that diesel was cheaper than gas by about 20c a gallon, back in 2003. It was a no brainer then, you bug a diesel truck but with the higher mpg and cheaper fuel it would pay for itself one day.... not anymore!

I love ny 2011 F150 ecoboost. It’s great at towing and gets decent MPG.
 
I would not own a Chevy 6.0 gas motor. Two of my sons have had those fuel hogs. When pulling a trailer they can easily get 4-5 miles per gallon. This is a loaded stock trailer or a tandem goose neck trailer. Heck even empty they will rarely get better than 10 MPG unless you want to drive at 50MPH.

I have had Chevy 454 and Ford 460s and none of them burnt fuel like a Chevy 6.0 does.
 
I bought my 6.0 used. It will pull anything I put on a 24' trailer with no problems. Fuel milage, empty is 15 mpg measured at the pump. It is the only one I have operated. I always wanted to drive another to see if mine is something special.
 
(quoted from post at 21:37:32 01/13/19) I have an 03 duramax with 250,000 miles on it and haul several heavy loads and like the diesel, I think if you are going from the duramax to the 6 liter gas and like the diesel power, you will be highly disappointed in the gas.the last gas truck I had was a 97 Chevy with 350 and automatic and haven?t had a gas truck in 15 years.
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How do you come to the conclusion that late model gasser such as the port injected 5.3/6.2 and in particular the recent direct injected 5.3.6.2 . With the 4,6,8 & 10 speed lockup automatics. How are they anything like your 1997 350 ?

The 1997 255HP, 330Lb Ft L31 350 was an improvement over a 165HP 1975 350 4 barrel with a three speed non lockup automatic. However it pales in comparison to the following engines.

LQ4
The Vortec 6000 LQ4, is a V8 truck engine. Displacement is 5,967 cc (6.0 L; 364.1 cu in) from a bore and stroke of 101.6 mm × 92 mm (4.00 in × 3.62 in). It is an iron/aluminum (1999 & 2000 model year engines had cast iron heads) design and produces 335 to 370 hp (250 to 276 kW) and 360 to 370 lb?ft (488 to 502 N?m).

A 2014 or later 5.3L is even better. Cost of a gasser with the power and economy of a diesel. 355 hp (265 kW) @ 5600 rpm 383 lb?ft (519 N?m) @ 4100 rpm.
Then there is the 6.2L ........420 hp (313 kW) @ 5600 rpm 460 lb?ft (624 N?m) @ 4100 rpm
 
Thanks to the federales and the frackers, gasoline powered light trucks are coming back big time.

I expect the trend to continue.

Dean
 
(quoted from post at 20:01:07 01/13/19) and I meant to say, that Duramax will go 500,000 -700,000 miles easily. Isuzu has one good engine there.
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Sorry red, but no D-max is going to go 5K-7K without a major overhaul, especially the LB7.

-Scott
 
hd6gtom: Yours must be special. LOL None of the 6.0 gas trucks my sons own/owned would ever get 15 MPG. Oldest son bought one new. When it had around 5K on it we took it on a week long vacation. Put bed cover on it an just had luggage in it and four adults. Driving 65-70 freeway driving it got 11-12 MPG. We backed the speed off to 60-65 and only got 12-13. Other son's 6.0. Used it to move a grand daughter's Grand Am car. Pulling a 20 ft. car trailer. Hauled the car 48 miles. So 96 miles round trip. Took 11 gallons of gas. My semis would have gotten 7-8 with that light of load.
 
My son's personal truck is a 2014 Dodge with a Cummins, and his work truck is a 2014 Chevy with a 6.0. He says the gas will pull ok, but needs to be kept wound up pretty tight, and uses a lot more fuel when towing than the diesel
Pete
 
500K to 700K? We had a well maintained 2001 Duramax with a 6 speed. While the engine was never overhauled in the 200K we owned it the injectors were all replaced 3 times. We could have dropped a new 6.0 engine in two times for what the three sets of injectors cost us. It was smoking when we sold it - we weren't spending the money to replace them a 4th time.
 
(quoted from post at 22:33:27 01/13/19) I have a gas truck and i regret not buying a diesel all the time. Mileage is terrible compared to similar sized diesel engines, especially while towing... and the diesel actually has available torque! Don't make a choice you will regret!
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Have you seen the bills for shop service on an emissions diesel ?
 
(quoted from post at 22:53:35 01/13/19) you will be saying "I wish I had my Duramax". I have been driving every diesel built by GM and this Duramax is unbelievable. your 2003 with 130,000 miles I sure would not be getting rid of it. that 6.0 L is a pig on fuel. I have driven one from work. and pulling with it will be a bigger pig.
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Ever seen the bill to replace injectors on those 2003-2004 Diesels ?
 
(quoted from post at 08:44:47 01/14/19) My son's personal truck is a 2014 Dodge with a Cummins, and his work truck is a 2014 Chevy with a 6.0. He says the gas will pull ok, but needs to be kept wound up pretty tight, and uses a lot more fuel when towing than the diesel
Pete
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When is the break even point where the diesel is cheaper to drive than the gasser ?
 
I have to agree with b&D on this one.....a 4000 dollar repair bill for injectors/ turbo etc on some of those diesels, Ford or GM is not unusual.
Ben
 
After 23 years with a diesel,I went back to a gas in 2013. When I went diesel,gas engines had carburetors and distributors. The new fuel injected electronic ignition things are a whole different story. If somebody is on the road every day hauling a load,yes,there's a place for the diesels,but for the average guy,it's just smoke and noise.
 

On a new truck the diesel engine adds $10,000 to the price tag alone.
If the diesel got 12 mpg towing and the gasser got 6 mpg, with todays $.80 to $1 difference in fuel prices it would take over 100,000 miles of driving just to save enough in fuel cost to pay of the diesel engine.
Add in DEF fluid, higher cost to maintain and any repair bills and one could be looking at hundreds of thousands of miles to justify the cost of a new model diesel pickup.
I love my old noisy, smelly, rattling 12 valve Cummins, it's simple and easy to work on, I did a full rebuild two years ago that cost less than the injectors in my friends common rail.
I plan to keep this truck till they take my licenses away.
If I were driving 40-50,000 miles per years and had to replace my present truck I'd look at another diesel, but for my under 20,000 miles per year I'd get one with a gas engine.
We do have smaller gas powered pickups for daily use, the diesel dually doesn't see much recreational use, it was bought and built to work.
 
I agree with most of the pro diesel guys keep the old one 03 Duramax, has a lot of life left as long as the rest of the truck is still holding up. I owned an 03 and still have an 07 classic with 130000 still as strong if not stronger than new. thought the 03 was great but got wrecked and replaced it with near identical 07 never regretted it. This truck was even better.
No one has mentioned one of the reasons for the success of these Duramax's. The engines work real well but without the Allison behind it I believe they would not have had as much success. Very smooth power transition and torque delivery. I've plowed a lot of snow and carried many loads with mine and very pleased how easily the power gets to the ground. I had many other trucks either personal and company vehicles including a 2012 6L pretty much identical to my 07. Mileage ok and would haul the loads but the rpms to move it loaded were twice the Duramax and when it moved would almost spin the tires breaking traction, same rear gears. I have enjoyed that low end torque and don't have to beat the truck for the performance.
 
So ok BUT to get these numbers where is the engine turning at , You have to scream the engine to get that . Now you take a OLD 460 Ford and they would pop out 500 Ft. Lbs at 34-or was it 3600 . Then ya take a diesel and your at peak torque at something like 1450 . Maybe i am just old and i am not into all this new and IMPROVED HIGHT TECT junk but how long would that engine last screaming it all the time to get peek power ????? . then ya look how they gear stuff anymore and you have to start dropping gears to make power and SCREAM the engine . Myself the jury is still out on the new 8-10 speed automatics , just more stuff to go wrong and once that warranty runs out Sweet heart your on your own . In my youth i worked at a Chrysler Plymouth dealership and two Ford Dealer ships , went thru factory training on the slush boxes and worked on many . Still have die hard old friend that still work in dealerships . My one friend that he and i go back to June of 68 still works at a Dodge dealership and when they came out with the NEW AND IMPROVED Asin or what ever they call it Denny told me that this transmission was BULLET PROOF . AH THATS A LIE , everytime i go over for parts or just to drop in and aggravate first place i stick my head in is the service dept and see what is scattered across work benches and guess what it is the new and improved slush box , The serive manager will get a chuckle when i look at him and point and BULLET PROOF . ya want to do some dragging then ya take a page out of the old Iron haulers hand book , and that is it takes IRON TO HAUL IRON . Best trailer toter i ever had was my 88 Ford F 350 with a 460 and a five speed . One clutch due to a throw out bearing failureand a ring and pinion failure due to a collapsed crush spacer , never drove that truck any faster then it would run and never hauled more then i could stack on the trailer.
 
(quoted from post at 09:32:17 01/14/19) So ok BUT to get these numbers where is the engine turning at , You have to scream the engine to get that . Now you take a OLD 460 Ford and they would pop out 500 Ft. Lbs at 34-or was it 3600 . Then ya take a diesel and your at peak torque at something like 1450 . Maybe i am just old and i am not into all this new and IMPROVED HIGHT TECT junk but how long would that engine last screaming it all the time to get peek power ????? . then ya look how they gear stuff anymore and you have to start dropping gears to make power and SCREAM the engine . Myself the jury is still out on the new 8-10 speed automatics , just more stuff to go wrong and once that warranty runs out Sweet heart your on your own . In my youth i worked at a Chrysler Plymouth dealership and two Ford Dealer ships , went thru factory training on the slush boxes and worked on many . Still have die hard old friend that still work in dealerships . My one friend that he and i go back to June of 68 still works at a Dodge dealership and when they came out with the NEW AND IMPROVED Asin or what ever they call it Denny told me that this transmission was BULLET PROOF . AH THATS A LIE , everytime i go over for parts or just to drop in and aggravate first place i stick my head in is the service dept and see what is scattered across work benches and guess what it is the new and improved slush box , The serive manager will get a chuckle when i look at him and point and BULLET PROOF . ya want to do some dragging then ya take a page out of the old Iron haulers hand book , and that is it takes IRON TO HAUL IRON . Best trailer toter i ever had was my 88 Ford F 350 with a 460 and a five speed . One clutch due to a throw out bearing failureand a ring and pinion failure due to a collapsed crush spacer , never drove that truck any faster then it would run and never hauled more then i could stack on the trailer.
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Agree 100%. Could not have said it any better.
 
I don't know anything about the 6.0 Chevy gas as I have Fords, but for a light load of 7,500# you won't notice much difference in gas or diesel for pulling. Now if you're taking about pulling 16,000# that's a different story. We've had both in Fords - 6.0 diesel, 7.3 diesel, 460 V8, V10 and V6 Ecoboost. Pulling campers that size the biggest difference is noise, smoke and maintenance cost for the diesels.
 
. SO WHAT if the engine revs up . The engine is made to do that on purpose . Before you give us some BS story about long engine life .
Your diesel can not rev due to the short camshaft duration . It has to make more power with increased combustion chamber pressure, increased heat and increased torque via turbo charging and intercooling. Now there are operating conditions that increase wear and stress .
You don’t realize it because you can’t hear it .
Your truck is a light duty vehicle that won’t see 4000hours before the body falls off the frame .
Don’t get confused a marine propulsion engine , an irrigation pump or base load electrical generation . Where the engine is operated for weeks and months at a time at full rated rpms and at full rates power . Where low rpms of 600,900 or 1200rpm is used to reduce piston speed on long stroke engines .
 
Well I had a GMC 1 ton with a 454 engine,ran good pulled good got about 6 MPG pulling my 30ft Gooseneck,replaced it with a f550 Ford diesel with a 6 speed got about 11MPG pulling
the gooseneck and pulled it easier than the GMC.The F550 has about 160,000 on it now and have had very little in repairs.
 
Cost difference between the two trucks?
Cost of diesel probably makes the miles per gallon difference equal.

JMHO

Vito
 
They were years apart so hard to compare costs the GMC always sounded like it was struggling,F550 just cruises along and if I'd of bought a gasser when I bought the diesel doubt it would be worth near what the diesel is now.Not going to sell or trade it though still rides and drives like it did the day I drove it off the lot.Rather take it on a trip than a car.
 
(quoted from post at 18:17:38 01/14/19) Well I had a GMC 1 ton with a 454 engine,ran good pulled good got about 6 MPG pulling my 30ft Gooseneck,replaced it with a f550 Ford diesel with a 6 speed got about 11MPG pulling
the gooseneck and pulled it easier than the GMC.The F550 has about 160,000 on it now and have had very little in repairs.
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The 454 was so old it had a carburetor. How could you use it as an example of a gasser in 2019?
Lets compare that Ford 550 diesel vs any 2019 diesel while we are at it.
I am surprised somebody hasn't mention yet how their 4020 diesel plough twice as much land on half the fuel than their neighbours gasser 4020. Then used that 1960's example as the basis to purchase a late model diesel vs late model gasser pickup.
 
(quoted from post at 23:59:47 01/14/19) I will give you this, I wouldn’t buy a new diesel, no matter what brand.

-Scott
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Fully agree, wouldn't trade my 12 valve even for a new diesel pickup.
But I do have a question, my 12 valve is also setup to make 300-350 hp (hasn't been dyno'd) but 15-16 mpg is about all I can squeeze out of it.
What are you doing or how have you got it tuned to get 20 mpg, not saying it's not happening, just would like to know how to improve the mpg on mine.
 
(quoted from post at 08:45:23 01/15/19)
(quoted from post at 23:59:47 01/14/19) I will give you this, I wouldn’t buy a new diesel, no matter what brand.

-Scott
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Fully agree, wouldn't trade my 12 valve even for a new diesel pickup.
But I do have a question, my 12 valve is also setup to make 300-350 hp (hasn't been dyno'd) but 15-16 mpg is about all I can squeeze out of it.
What are you doing or how have you got it tuned to get 20 mpg, not saying it's not happening, just would like to know how to improve the mpg on mine.
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20 mpg? Is that according to the on-board computer? Or is it calculated the old fashioned way using a pencil, paper, and math?
 
No computer on mine, either.

Nothing special, Destroked. Mine is a ‘98 QCSB SRW RWD with a Goerend’s auto and 3.54 gears. The engine came out of my ‘95 SCLB auto RWD that got totaled out in my driveway, so it’s the 160hp pump. I currently have a set of stock 215 injectors, a #10 fuel plate, 3K governor springs, timing at 17*, an HE351CW from an ’05, ATS manifold, and 4” exhaust with an MPRP muffler.

The best I ever got was 25. At that time it had a 5-speed (the auto went out so I swapped in a manual), some DD-III’s (Diesel Dynamics), and a Sled Puller 66 turbo. It put down 423/918 on a dyno. I was driving 50 miles one way to work through the woods never getting over 55mph. That was during the fall and spring when I wasn’t using the AC and the fuel wasn’t winter blend. The AC and winter fuel dropped it to 22.

-Scott
 
mvphoto29910.jpg


mvphoto29911.jpg


mvphoto29912.jpg
 

Couple of good looking trucks, shame the one got messed up.

This F-450 is heavy and is a 4x4 so neither of those help, Truck weights 9500 lbs empty.
My first engine was nearly same as yours, 95 160 engine, 215 inj, 10 plate, 16 degree timing, S300G 57mm turbo on stock manifold, connected to the Ford ZF6 manual with 3.73 gears. It would get 15-16 empty and 11-13 loaded but it used a lot of oil so I built a new engine to replace it.
Current engine is a 215 with 5x12 inj, AFC Live tuner, 15 degree timing, same S300 turbo on a stainless manifold. Haven't got it tuned properly as it hazes to much in the midrange. It pulls better than the old engine but fuel milage is down 1-2 loaded and empty.
Have a small exhaust leak to fix before I can finish adjusting the afc to clear the hazing, if I can get it to 16-17 mpg empty I'll be happy


mvphoto29942.jpg




mvphoto29944.jpg
 

Best mileage over 50Km, 100Km and 650Km. Mrs B&D’s 6.2L 420HP, GMC Sierra 4X4 crew cab SLT , Max Trailering package with the high ratio final drive . Rated for 10,500lbs trailering and 7600lb gross for the truck.
I don’t see how a diesel is cheaper to drive .
 
Fine job on the conversion. Yes, I'd say the 4x4, dually, and the weight of your truck are [i:1934d7d12c]DEFINITELY [/i:1934d7d12c]contributing factors. I always wanted to put a ZF6 in mine. I think it's the best tranny out there for this application.

I've also wanted to go with the AFCLive. How do you like it?

I have a virgin, low mileage, 175 pump sitting under my desk waiting to be put on and I had Weston at Infinite Performance rework my DD-III's that I'll be putting back in when I do the pump. I have a coolant leak right now around the back of the head that I hope is from that rear freeze plug and not the head gasket. I put the blocking plate on it when I had the engine out. It only leaks when it's cold. As soon as it gets some heat to it it doesn't leak a drop. Hopefully it's just that o-ring. If it is the head gasket I'm going to wait and do the pump and injectors at the same time.

-Scott
 
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