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Tractor Talk Discussion Forum

synthetic oil

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Charles Bane

11-12-2003 16:00:26




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what has been you experience with it in engine and hydraulic system




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carhartted

11-13-2003 16:47:30




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 Re: synthetic oil in reply to Charles Bane, 11-12-2003 16:00:26  
I use synthetics during the winter months but then switch to standard petroleum iol for the summer.

The olny reason I do this is because it can get very cold here in Alska, they are calling for 40 below zero weather by early next week.

Jonathan Fairbanks, AK



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FarmallH42

11-13-2003 10:33:37




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 Re: synthetic oil in reply to Charles Bane, 11-12-2003 16:00:26  
If your engine has sludge, synthetic will break it loose causing problems. But in a clean engine it will do great.

I run Mobil 1 in my pickup, about 5000 to 6000 miles between changes. I change the filter at 2500 to 3000.

My H was broke in on CaseIH low ash 30 weight oil for 85 hours (changed twice). Now it gets Mobil Delvac 5w-40.

Have an Explorer with 155k miles on it. Not sure if I'm going to change to synthetic because of oil leaks (1 qt per 1000 miles) and possible build up in the engine.

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Ludwig

11-14-2003 14:54:34




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 Re: Re: synthetic oil in reply to FarmallH42, 11-13-2003 10:33:37  
Go for it, my Dakota had 130,000 on it when I changed, and like yours it leaked. After a couple thousand miles the leak is all but gone.



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Ludwig

11-13-2003 06:42:43




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 Re: synthetic oil in reply to Charles Bane, 11-12-2003 16:00:26  
I've used Mobil 1 in a bunch of things now and like it alot, especially in small aircooled engines like in a lawnmower.
I don't know where nolan is getting the "added sludge" other than this is a high detergent oil so it'll probably move sludge around that was always there.
I've also heard lots of people say synthetic oil will increase compression by helping free up stuck rings or reduce sludge and carbon buildup. I don't know if I believe that.
I have an older White 11hp lawnmower that has been really hard to start the last couple years, since changing to synthetics its taken like 5 years off of it. Its not like a new machine but its alot better. My new 12hp mower has more power and makes a cleaner cut. My '96 Dodge Dakota that used to leak a quart of conventional oil each 1000 miles, now it leaks closer to 1 quart in 4000 miles. My '83 Mercedes 240D is a powerhouse since switching to Mobil 1. Well, its as much of a power house as a 65hp car can be.

In the truck I change at 6000 mile intervals so the cost is exactly the same. The car will get 4500-5000 mile changes, its a diesel after all.
Lawnmowers get changed once a season.

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Nolan

11-14-2003 04:40:50




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 Re: Re: synthetic oil in reply to Ludwig, 11-13-2003 06:42:43  
No, synthetic oils are not high in detergent. The AP rating dictates the amount of detergent and other additives they are allowed to have. This is a range and they do not exceed it, no matter how much the marketing guys like to claim they are somehow super detergent. An AP SG oil is an SG oil, regardless of who made it or whether it's a synthetic or not.

Synthetics tend to promote sludge because of their free flowing nature. They will not hold things in suspension like a regular dino juice oil will. That is the reason for the increased sludging. I'm not talking about some huge increase in sludge, especially not the type caused by old Quaker State oils that would react with combustion by products making their own sludge. I'm just talking about the sludge that builds up in the bottom of the pan and on the heads from drop out. It is not a hard caked sludge or varnish either.

This drop out tendency is why synthetics tend to look better in use than a regular dino juice oil does. The dino juice holds the contaminates in suspension, looking quite black and nasty. The synthetic will drop it to the bottom of the pan, and look clearer as a result. The oil will be in better shape as a result of this in fact.

You can watch this yourself if you'd like. Take a drain sample of synthetic oil, place it in a glass jar and set it on the shelf. Take notes of how it looks over the next few days.

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Nolan

11-13-2003 03:17:10




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 Re: synthetic oil in reply to Charles Bane, 11-12-2003 16:00:26  
Lets see, my lowest mileage vehicle engine has 220,000 on it, and that's a hard driven turbo. Some of my other engines have half a million miles, and one has the original bearings from back in 1948. All on standard motor oil.

Without exception, I have never seen an oil related engine failure on any engine that had proper oil & filter maintenance.

Are synthetics better at lubrication? Yes. Are they necessary? In my opinion no.

Are there any drawbacks to synthetics? In my opinion and experience, yes. They leak more, sludge up more, and are frequently more abused because of their high price.

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I Like Case

11-12-2003 21:12:51




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 Re: synthetic oil in reply to Charles Bane, 11-12-2003 16:00:26  
I am a firm believer in sythetics. I use it in most everything I own. Street cars, race cars, Harley, tractors and airplanes. I have had people tell me "synthetics are great but I can't afford them." My response is that I can't afford NOT to use them. They will give you extended life and better performance in nearly every instance.



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buickanddeere

11-12-2003 20:20:14




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 Re: synthetic oil in reply to Charles Bane, 11-12-2003 16:00:26  
The two highest quality brands are Mobil 1 and Amsoil. Other brands of synthetic can be less effective than a premium quality mineral oil. Synthetics have the advantage in extreme cold,heat or pressure.



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Ray,IN

11-12-2003 17:46:10




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 Re: synthetic oil in reply to Charles Bane, 11-12-2003 16:00:26  
Read this information that was gathered by a very inquisitive man that does not accept advertising agency retoric:



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sammy the RED

11-12-2003 21:43:52




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 Re: Re: synthetic oil in reply to Ray,IN, 11-12-2003 17:46:10  
Lots of info. there !
Thanks.



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Willy-N

11-12-2003 16:29:33




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 Re: synthetic oil in reply to Charles Bane, 11-12-2003 16:00:26  
I run it in my 48 Power Wagon which has a Flat head 6 in it. Sure is nice oil! I use the Chevron 15-50 and in the summer time it holds better oil presure when it is real hot out. Other regular type oils droped pressure when it was 100+ out pulling the hills. The water temp also ran a little cooler about 3-5 degs on the same hill. I am sold on it and it dose not use a drop between changes but it is also a fresh rebuild on the engine. Mark H.

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Willy-N

11-12-2003 23:24:22




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 Re: Re: synthetic oil in reply to Willy-N, 11-12-2003 16:29:33  
Correction I use Mobil 1 not Chevron that is my gas station I use and do not know why I got it mixed up??? Mark H.



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ErnieD

11-12-2003 16:05:21




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 Re: synthetic oil in reply to Charles Bane, 11-12-2003 16:00:26  
Have used Amsoil in my Corvette, engine and transmission. Did document mileage improvement while it was in the engine. Did make it possible to shift in the 40's and 50's. Still running it 25 years later.



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