Black Oil

[Jinma284]

What causes the oil to turn black very quick in the motor of my 2425 04 Jinma.

 

[k0ua]

What causes the oil to turn black very quick in the motor of my 2425 04 Jinma.

Carbon particles.

 

[Bob Rooks]

Carbon particles smaller than .09µ. In layman's terms - soot. When was the last time the air cleaner was checked / replaced?
This can also be a symptom of a cold running engine.

 

[PILOON]

All diesel engines produce soot and every one I have owned turns the oil black very fast.
I have 'special' clothes and gloves (dirty) that I keep just for my oil changes.

 

[Fawken]

And one for what Piloon said. First time I changed my own oil in the tractor, I called the dealer thinking something major was amiss. He laughed. That was 30 years ago.

 

[Bob Rooks]

All diesel engines produce soot and every one I have owned turns the oil black very fast.
I have 'special' clothes and gloves (dirty) that I keep just for my oil changes.

It should not happen "very fast". I change my dozer's TY395E engine oil by analysis (voo-doo to some people). Currently approaching 500 hours on one oil change and two filter changes. Oil is brown, with less than .002% fuel dilution and .0% coolant contamination. I also run it at 185 degrees F.

 

[LincTex]

Bob Rooks is right about oil change analysis. It isn't voodoo - the lab will tell you when it's time to change. Every diesel I work on that holds more than 5 gallons gets this done. I have seen some engines go 1000 hours on the oil (usually generators that run for weeks at a time) and the lab said the oil was still good. Many farm tractors I work on regularly go 500 hours with little to no oil degradation.

NOW - some engines are "heavy breathers" (meaning lots of crankcase blowby) and these are usually the ones that have black oil fast. If you can keep the combustion gasses from going past your pistonrings, you'll never get black oil.

 

[cleat]

The old 1967 Ford 4000, and 1973 David brown 990 on the farm I grew up on seemed to always have black oil shortly after a change.

My Dong Feng stays clear on the stick. However, I would not work mine even close to how the old farm tractors were being ran hard 7 days a week.

Cleat

 

[Wa11banger]

Mine is also clean on the stick when I do my oil changes.. With that being said.. my 404 does not have a turbo. Turbo is the quicker blacker upper in any diesel engine. All of my diesels that are non turbo just about cant change the color of the oil between oil changes. Maybe I am changing oil too often (can you really do that?) Anyway the turbo diesels will be black before the new oil makes one cycle through the motor due to the coking or sooting from the turbo.. If your engine is non turbo and you are getting very black oil quickly you have something wearing very quickly, or a large mount of blow by.. Worn cylinders, rings, stuck rings etc

 

[sd455dan]

Mine is also clean on the stick when I do my oil changes.. With that being said.. my 404 does not have a turbo. Turbo is the quicker blacker upper in any diesel engine. All of my diesels that are non turbo just about cant change the color of the oil between oil changes. Maybe I am changing oil too often (can you really do that?) Anyway the turbo diesels will be black before the new oil makes one cycle through the motor due to the coking or sooting from the turbo.. If your engine is non turbo and you are getting very black oil quickly you have something wearing very quickly, or a large mount of blow by.. Worn cylinders, rings, stuck rings etc

i disagree about the turbo (causing) black oil= my 03 Cummins equipped Dodge truck will only slightly darken the oil at 7500 miles,whereas my Ford 3000 non turbo will turn the oil black in just a few hours of operation. i think it has a whole lot more to do with ring seal... over fueling doesn't help either or lots of idle time-wet stacking. jmo