- Dec 13, 2002
- North Carolina
This is a friends ride, it is the Denali GMC with the 6.2l. He came to visit and I swapped out all the fluids front to back. I figured I would send in a sample of his engine oil. He has been running ASL from new and changed it out when the OLM got down to 5%. He also is running an AMSOIL air filter and EaO oil filter. When I pulled the transmission pan to change out the filter the inside was spotless, I couldn't believe it with the mileage that was on it being the original fluid. The magnet had just s light dust on it, same goes for the rear and front diff. The transfer case looked great also. I told him this is a keeper truck for sure.
Everything looks good in this sample from your Sierra Denali. Universal averages show typical wear metals for this type of engine after about 5,900 miles of oil use. You've run a little less than that, at 5,000 miles, but your wear metals are all well below average levels, so your engine is seeing less wear at mechanical parts than most other engines that we see -- that's a good thing, and hopefully it will lead to a nice, long life for this engine. No contaminants were found, and the TBN is good at 4.0 (1.0 is too low), so try running 7,500 miles on the next fill. Great report! OIL ASL5w-30 MILES IN USE 5,000 MILES 92,000 SAMPLE TAKEN 10/28/13 ALUMINUM 4 CHROMIUM 1 IRON 10 COPPER 22 LEAD 2 TIN 0 MOLYBDENUM 142 NICKEL 0 MANGANESE 0 SILVER 0 TITANIUM 0 POTASSIUM 0 BORON 80 SILICON 11 SODIUM 6 CALCIUM 3547 MAGNESIUM 14 PHOSPHORUS 743 ZINC 800 BARIUM 0 INSOLUBLES 0.1 WATER 0 FLASHPOINT ºF 430 SUS VIS 210ºF 58.9 cSt @ 212ºF 9.91 Fuel% <0.5 Antifreeze% 0 Water% 0 TBN 4.0