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1995 7.3 Powerstroke Mileage

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Author  [Modern View]

12-03-2013 13:36:37

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1995 ext cab F250 7.3 Powerstroke 4X2
3.55 axle ratio
3" exhaust from turbo back
injector cc increase
mild program upgrade
195 degree thermostat
stock airbox
non intercooled
235/85-16 hwy tires @ 65psi
5spd standard tranny
55-60mph average small hills and infrequent stop & go
air temp approximately 80-85 degrees
1500-1750 cruising rpm
Rotella 15W-40 oil
Power Service Extreme Diesel fuel
cargo: suitcase, spare, power tools, tool boxes
trip length: 175 miles

Filled up front tank from same pump till shut off. Did not overfill.

Previous mpg tests (same route): 24.3mpg (old injectors & program) 26.5mpg (new injectors and program)


(Future mods: oil additive, intercooler, increased fuel pressure & timing mods, higher tire psi, no jackrabbit starts or passing, less cargo, 203+ thermostat.)

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12-28-2013 04:45:33

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 Re: 1995 7.3 Powerstroke Mileage in reply to Mopower, 12-03-2013 13:36:37  
I don't believe it. If those figures were accurate - you've probably got a world-record breaker.

My 1985 Isuzu mini-truck with a 2.2 liter diesel gets 27-28 MPG.

I've driven and owned many 7.3 diesels in Ford trucks. The best MPG I ever got on a slow highway cruise (55-60 MPH) at a low altitude on a flat road with no wind was 19.5 MPG. That with a 5 speed OD trans and a 3.5 axle ratio.

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12-09-2013 10:13:25

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 Re: 1995 7.3 Powerstroke Mileage in reply to Mopower, 12-03-2013 13:36:37  
I agree that must be a new powerstroke record. My 05 automatic 6.0L w/ cold air intake, SCT tuner (on street setting), MBRP exhaust, and rolling on 35x12.5x20 tires only gets me 15 Hwy and 10 pulling a trailer. I would kill for anything around 20 mpg.

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T in NE

12-07-2013 17:10:05

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 Re: 1995 7.3 Powerstroke Mileage in reply to Mopower, 12-03-2013 13:36:37  
You'd need a really soft foot to get that out of a truck with all the aerodynamic attributes of a brick. Might be possible with a very soft foot, short-shifting, and a steady top speed of 60. My 90 Cummins has done an estimated 23 or so (speedo and odometer read way slow) on the interstate with a new fan clutch and topping out at about 70. I would definitely check at the pump and not go by what a built-in guess-o-meter or the tuner are telling me.

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12-09-2013 10:39:25

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 Re: 1995 7.3 Powerstroke Mileage in reply to T in NE, 12-07-2013 17:10:05  
I don't have a tuner that actually tells me anything, just a program that a buddy puts on chips at his diesel shop. I used the odometer and the pump. I also checked my odometer my route on mapquest. VERY light in the foot, although I did pass a couple slower cars. The last trip included my 275# buddy and some back roading therough the woods this fall. It was about 25mpg when we filled up.

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12-06-2013 15:27:00

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 Re: 1995 7.3 Powerstroke Mileage in reply to Mopower, 12-03-2013 13:36:37  
Got 2 7.3 engines
one is a non Turbo, IDI, 1994, F350 DRW, 4x4, best I can ever squeeze out of her is 11.
2000 F250 SRW, 4" exhaust, tuner and K&N AF, get about 14 around town, about 16-17 on highway, with RPMs kept under 2K, drops a couple MPG over 2K RPM.

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12-05-2013 06:55:15

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 Re: 1995 7.3 Powerstroke Mileage in reply to Mopower, 12-03-2013 13:36:37  
That mileage seems a bit high. My best ever with my 2wd 1997 cummins was 25 all highway going 60mph. Best EVER.

Getting 27 mpg out of a powerstroke has to be some kind of record.

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12-06-2013 14:18:18

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 Re: 1995 7.3 Powerstroke Mileage in reply to PretendFarmer, 12-05-2013 06:55:15  
i agree.

my 99 350 drw, 4.10 gears 4x4, hauling 3 tool boxes, 5w40 syn oil.. makes 15 city.. maybee 17.5 hwy.

my 04 250 6.0 4x4 3.73 rear 1 tool box 5w40 syn oil , upgrade air box, mild tuning can make, 15-16 city, and 19 hwy ( pulling an unlaoded 16' trailer.. ~ 2200# etc. if i keep my foot out of the turbo.

,my 99 450 drw, hauling bed and 3 tool boxes, aux 50g fuel tank, 19.5" tires, 4.88 rear, pulling about 5000# unlaoded gooseneck will make about 15 city or hwy. Sweet fuel spot is 67-72mph. if I pass that, fuel eco starts diving... especially if loaded. I pulled a 12k load out of south florida.. tall passanger van..e tc.. and was making 75 ish on the interstate.. economy dropped to like 9... ;)

70 and under for that old girl.. .. otherwise she eats too much....

ps.. I'm suspicous of any MPG #'s after a tuner is used. I have a feeling they use some fuzzy hash to skew the #'s. I always do tank fill and miles travelled to get a real idea...

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12-09-2013 10:33:57

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 Re: 1995 7.3 Powerstroke Mileage in reply to soundguy, 12-06-2013 14:18:18  
I used the tank fill and miles traveled. I double checked my odometer with the route on mapquest. I'm hoping to do a well documented test next summer after a couple improvements. I can't get much over 20mpg doing 70mph. It likes 55-60mph. doing 65-70mph with an 8X20 grain ox on the gooseneck trailer got me 8mpg in windy flat cold Illinois. The worst I've ever got!

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12-05-2013 04:10:41

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 Re: 1995 7.3 Powerstroke Mileage in reply to Mopower, 12-03-2013 13:36:37  
[Had] a 2011 Ford diesel reg cab,pulling trailer 7/8 MPG empty usually 65+ 10/11M.P.G had a 21 gal tank.Every body else claimed 14+ but I did not.The older trucks Cummings and PowerStroke both got excellent mileage before all the anti pollution and computer technology.I know several that changed everything and increased power and mileage but I trade every year for about $.15 a mile so I live with what I have.

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super trucker

12-03-2013 17:05:08

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 Re: 1995 7.3 Powerstroke Mileage in reply to Mopower, 12-03-2013 13:36:37  
Look at beans diesel performance for there injector driver module. It's the silver box mounted on fender behind the air box by firewall. Much more responsive on the throttle so I didn't have mash on it to get going. And a big honken air cleaner. What I had on my blue and white truck .

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