2 stroke oil in a Duramax? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 47 (permalink) Old 11-11-2009, 01:21 AM Thread Starter
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2 stroke oil in a Duramax?

Anyone running 2 stroke in their Duramax? Comments good or bad? Impressions?

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post #2 of 47 (permalink) Old 11-11-2009, 04:24 AM
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I have tried it.Used it for 5 or 6 tanks in a row. I didnt stick with it. I used castor 927. maily cause i had alot of it from my banshee. the only difference i noticed was a very slight quiter idle. I often run the marvels mystery oil and i do notice a little difference in fuel mileage with that. I am curious if and what others noticed. Maybe a different brand of 2 stroke oil is more beneficial?
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post #3 of 47 (permalink) Old 11-11-2009, 05:52 PM
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i use the low ash 2 stroke oil 1 gallon from walmart and i did notice the engine runs quiter and is good for the injecters. there was a test on diesel power that showed a gain in fuel economy
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post #4 of 47 (permalink) Old 11-11-2009, 10:58 PM
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Oil

Tried Stihl 2 stroke oil but I did not notice any difference so switched to the fuel conditioner John Deere sells,not sure the name of it off the top of my head but there is a summer and winter additive.I find it works because if I miss adding it, it throughs P0089 code.
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post #5 of 47 (permalink) Old 11-11-2009, 11:58 PM
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um not adding an additive should not be throwing any codes.... the duramax engine is designed to run on USLD, even the older ones

2-stroke oil IMHO doesn't do enough to make a big difference, or be worth the effort/expense of doing it, because you have to be very precise when you add it, you cant add too much or too little, PITA because its more crap you have to carry around in your truck, in the winter you could run an anti-gel just to protect against fuel waxing, but i dont see the benefits of additives, you can get more lubricity out of some B5 biodiesel

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post #6 of 47 (permalink) Old 11-12-2009, 03:14 AM
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a qt of atf to full tank from time to time does a good job cleaning fuel system.

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post #7 of 47 (permalink) Old 11-12-2009, 03:28 AM
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Originally Posted by vrabel View Post
a qt of atf to full tank from time to time does a good job cleaning fuel system.
I 100% disagree... ATF contains friction modifier. Which means you are putting very small sand like particles through your motor
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post #8 of 47 (permalink) Old 11-12-2009, 03:39 PM
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doin it for over 20yrs with no issues.

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post #9 of 47 (permalink) Old 11-13-2009, 02:05 AM
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doin it for over 20yrs with no issues.
I would say that is a pretty good run..
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post #10 of 47 (permalink) Old 11-13-2009, 02:16 AM
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Yikes !
2 stroke oil i tired running that in my trucks along with the ATF and MMO as well. . .

I used AMSOIL 2 stroke oil and AFT i noticed nothing so then i tired Super tech 2 stroke n AFT noticed nothing then i tried a few bottles worth of MMO and again noticed nothing. . .

So 2 brands of AFT n 2stroke no effect on any of my diesels and 2 or 3 big bottles of marvels all of which didn't do a thing for me. . .

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6 truck truck's 6 different engines years mileages uses ECT.

Now i did how ever notice the larger truck's started faster and had better throttle response running the AMSOIL diesel lubricant fuel additive. . .

EDIT:
now that might be an additive you guys might want to try. . .

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Last edited by M123KT-450; 11-13-2009 at 02:19 AM.
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