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Old 01-16-2008, 04:14 PM   #1 (permalink)
Aoelian
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Burning used motor oil, now big problem

Hello all, yesterday I changed my oil and poured the entire 2 gallons of hot motor oil into my fuel tank thinking that because it was hot, it would just dissolve into the full tank of fuel I had and all would be good.

Well apparently that didnt happen, I started it up this morning and it ran ok for maybe 30 seconds, then it started getting a little combustion knock, check engine light came on, and it has gotten hard to start.

Im hoping the fuel became too dark for the optical sensor to see thru. i have dtc 17 18 35 54.

Ive drained all but a gallon or so of the fuel out of the tank, and will replace with fresh diesel later this evening and see what happens.

I was wondering, with the fuel being much darker, almost black, WOULD that be enough to cuase these problems, or have i done more serious damage to say the injector pump?

Any thought plz,

Thanks

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Old 01-16-2008, 04:19 PM   #2 (permalink)
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Im Sure The Fuel Filter Didnt Like That.2 Gallons Or 2 Qts...HAD TO EDIT I DIDNT SEE THAT IT WAS A 6.5.IM NOT TO KEEN ON THOSE

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Old 01-16-2008, 04:44 PM   #3 (permalink)
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I wouldn't try that again, motor oil will leave alot carbon buildup in pistons and heads, hard on the fuel system, and its just not something that you should do again, I would flush the fuel system and definitely change the fuel filter a few times!! Let this be a lesson why one shouldn't use motor oil as fuel.
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Old 01-16-2008, 04:52 PM   #4 (permalink)
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There are still people who thinks, that they can run used motor oil as fuel or fuel additive. Sorry, but the only thing i can thought about this is "dumb, really dumb !".

NEVER runs motor oil, either new or used as fuel or fuel additve.

Spend a few bucks more to buy a additve like standyne, 911, diesel kleen, to name a few or usa 2-STROKE-OIL ! THIS OIL IS MADE FOR BURNING !

Cu,
Sven

BTW : Get the crap out of your fuel system, flush it, change the filter a few times and hope, the porblem is gone.
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Old 01-16-2008, 05:36 PM   #5 (permalink)
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Quote:
Originally Posted by chevylover View Post
There are still people who thinks, that they can run used motor oil as fuel or fuel additive. Sorry, but the only thing i can thought about this is "dumb, really dumb !".

NEVER runs motor oil, either new or used as fuel or fuel additve.

Spend a few bucks more to buy a additve like standyne, 911, diesel kleen, to name a few or usa 2-STROKE-OIL ! THIS OIL IS MADE FOR BURNING !

Cu,
Sven

BTW : Get the crap out of your fuel system, flush it, change the filter a few times and hope, the porblem is gone.
to date, nothing has worked better on my balance rates(duramax). even running 2 gals though out the winter per tank. however, i do filter mine before i pour it in.


oh yeah, just call me dumb 80k+ miles, balance rates have never been better.




Aoelian, did you pour the oil in first then fill it up?
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Old 01-16-2008, 06:13 PM   #6 (permalink)
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Hey Moss, what are balance rates?

As for mixing dirty old oil in the fuel, that is plain insane. The reason the oil is black is becuase of all the deposits in it......and now you want to throw that crap into your injctors, and pump. You have the balls.! Hopefully it all works out.

The saying "A little knowledge is dangerous", comes to mind.

We should start a thread of all the silly things we have tried, we could all have a good laugh, maybe call it, "the jokes on me" thread! hahaha. But I'm not going to be the first.
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Old 01-16-2008, 06:20 PM   #7 (permalink)
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i did the same thing to my 97 6.5td about a month ago, and it instantly ran like crap because of the dirty motor oil, optic sensors dont like dark oil. i will not do that again!
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Old 01-16-2008, 08:29 PM   #8 (permalink)
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There are a lot of opinions floating here without experience evidently. I have been burning my used engine oil in with my fuel for about 15 years in all sorts of diesels, Cummins, Cat, John Deere, Powerstroke, Duramax, etc. and have never had one problem with pump, injectors, or any part of the fuel system on any of them. The only trouble it has ever caused me, is it don't want to flow through a Duramax fuel filter very good when it's cold and you pour a whole oil change in when the tank is less then half full. One of the engines is a 855 Cummins with over 700,000 miles at 600HP and the only thing done to it has been to run the overhead (adjust the valves). Been burning all it's own oil changes since it was new. I just cant see changing my ways with the success I've had.
P.S. On a tractor with a consistent load, I see 2 psi. more boost with the oil in the fuel at 5% mix.
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Old 01-16-2008, 08:45 PM   #9 (permalink)
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Quote:
Originally Posted by FIREFIGHTER 503 View Post
There are a lot of opinions floating here without experience evidently. I have been burning my used engine oil in with my fuel for about 15 years in all sorts of diesels, Cummins, Cat, John Deere, Powerstroke, Duramax, etc. and have never had one problem with pump, injectors, or any part of the fuel system on any of them. The only trouble it has ever caused me, is it don't want to flow through a Duramax fuel filter very good when it's cold and you pour a whole oil change in when the tank is less then half full. One of the engines is a 855 Cummins with over 700,000 miles at 600HP and the only thing done to it has been to run the overhead (adjust the valves). Been burning all it's own oil changes since it was new. I just cant see changing my ways with the success I've had.
P.S. On a tractor with a consistent load, I see 2 psi. more boost with the oil in the fuel at 5% mix.
Did you filter it first? or just dump the dirty oil. I think he dumped 7 quarts of straight dirty oil?
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Old 01-16-2008, 08:50 PM   #10 (permalink)
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I use a very clean bucket or pan to catch it and pour it right in. I figure the oil has been through the engine oil filter thousands of times already. It may make a difference that I try not to let my oil get extremely black before I change it.

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