CM871 400HP Dyno sheet

[Hammerhead]

(06-04-2017 )Vjex Wrote:  Great information, thanks a lot.
Oil is fresh in the truck, actually is overfilled a bit.( I hate when they overfill it, but it happens a lot) . If I pull an oil sample on brand new oil (lets say 100 miles), will it show even the smallest coolant contamination?

Much appreciated!

Possible, but very doubtful on fresh oil. If it does show coolant contamination on fresh oil the problem is severe! I would say you should have at least 5000miles on the oil to get any kind of decent reading, and 10k would be better. Anything less would be too unreliable IMHO. Oh and this is using a decent lab, not a Speedco special.
If I am looking at a used truck and it has fresh oil in it, I am immediately suspicious. What are they trying to hide?
When I sell a used truck, it has used oil in it, so a diligent purchaser can pull his own samples and know I'm not hiding anything. I've never had anyone do that thorough of an inspection!