Diesel lubrication question!

[ConnClark]

Originally Posted by UFO

We are not talking about over-extended change intervals, the test oil was 5k miles, within a normal change interval. Anti-oxidation additives will certainly last that long. I've had oil tested at 10k miles with nothing out of spec, so I doubt you can make the claim the oil lubricity is significantly changed in 5k miles, or 10k for that matter.

But I can make the claim that it had particles of soot and metal in it which contributed to the wear in the test.

[UFO]

Originally Posted by ConnClark

But I can make the claim that it had particles of soot and metal in it which contributed to the wear in the test.

I'd like to see that. A typical oil analysis, like this one,


measures contaminants in single and double digits ppm. Make the case, but I am doubtful of this potential cause of wear as well.

[DonR]

Look into one of these

Red Line Synthetic Oil - Diesel Fuel Additives - Diesel Fuel Catalyst

Schaeffer Oil | Diesel Fuel Additives, Stabalizers, Conditioners, Treatments

[Duffman]

I take some of these results with a grain of salt but it will add some insight into the discussion.

Lubricity Additive Study Results - Diesel Place : Chevrolet and GMC Diesel Truck Forums

[slowmover]

Can't go wrong with any product by Schaeffer's.

Stanadyne is the default additive otherwise.

[Big Dave]

larrybuck:

You need to check out The Diesel Page - for the 6.2L, 6.5L, and Duramax 6600 (6.6L) GM Chevrolet and GMC diesel engines.

They have a mountain of information you need to check out.