Charlie8301

Got the oil analysis back, chromium is at 23 ppm Truck is at 97,000 miles. How bad is it, do I have some serious ring wear. No excessive blow by, no oil consumption, no power loss. Oil had 4000 miles on it. Also broke in a new turbo on this oil change.

Randy

Diesel-Dan

Get in touch with RJohnson....he is in the Engine Oil Bussiness.......

Topper

I have my oil analyized every oil change.(15,000-20,000 miles) I have never had over 1ppm. I think you should pull another sample. What method are ya using to pull the oil? Is the engine hot? Is it still running? What were the rest of the wear metals?
Topper

Charlie8301

Engine had been started but not warm. Pulled oil plug and got sample wile draining. Other metals were normal except for iron was a little high but still in cummins spec. Spec. for chromium was 15ppm. Had been drag racing on this oil change. EGT's were1400ish for a few secounds. If it was ring wear will it fall back to normal if I don't hot rod it?

Randy

RowJ

Cromium is usually ring or rod wear.
23 PPM is not terrible...but it's high. I usually run 3-7 ppm, even when drag racing, w/ Oil changes @ 7500 miles!

Samples should always be taken after driving a while, with oil warm and circulating. Also should come from middle of the drain stream....not off first squirt, which picks up stuff (technical term) in the bottom of the pan!

I would not worry about it, till next change. Do another analysis and see what you get. Oil analysis is really for engine trends....not for one time readings. have you done analysis before?

RJ

Charlie8301

I have 3 other sample and all were about 3ppm, but the truck was mostly stock at the time of the other samples.

Charlie8301

I suspect its ring wear from short bursts of high egt's, if that is what it was from, would it fall back to normal if I keep egts down, or is there no stoping the wear once it starts

RowJ

Less temp, less load = less wear. It is reversable. But I repeat...23 PPM is not serious wear. Probable was not even "flagged" by the company doing the analysis?? AND maybe, it IS from the new turbo? (I don't know the metalurgy of turbo internal parts...but would not surprise me).

Just check it next oil change and see whazup!

Want a real scare....check your rear end gearlube and plug magnet after a day at the drag strip.

RJ

Charlie8301

Thanks RJ. Truck HAS to get me back and forth to work so anything out of the norm makes me very nervous

Randy

ratsun

I had 1700ppm Cr and 2800ppm Iron on my 24v sample after I had the FP fall out and it got hot! Never kept it long enough after to trend it.