The last five oil analysis from my 2500HD Silverado. Engine is the LQ4 iron-block gas 6.0L V8. This truck is used almost exclusively for towing a racecar around the country, so lots of long highway slogs with a ~ 6,000lb load. It's a four speed auto with 4.11 gears, and it definitely turns some RPM. I have typically changed the oil when the dash indicator says it's time and analysis has yielded very consistent results.
I bought the truck with 100,000 miles on it and the original owner had the same usage as I do.. 90% towing. He used PP 5W30 so that's what I used except for one oil change when the parts store didn't have it in stock. Filters are Purolator Pure One.
Code:
Mi on Oil 6300 6000 6300 7400 7300
Mi on Unit 156300 150000 143990 137700 130300
Aluminum 3 4 4 4 4
Chromium 1 1 1 1 1
Iron 20 49 23 32 28
Copper 5 7 7 11 11
Lead 4 2 6 7 12
Tin 0 0 4 0 0
Molybdenum 51 55 57 57 56
Nickel 1 1 1 1 1
Manganese 0 1 1 1 1
Boron 10 1 2 3 4
Silicon 10 9 8 12 9
Sodium 14 5 3 5 5
Calcium 1989 2115 2452 2281 2203
Magnesium 9 9 10 8 12
Phosphorus 550 593 656 685 607
Zinc 636 726 786 793 754
Sus visc @210F 57.8 59.2 61.3 58.7 58.6
cSt Visc @100C 9.60 9.98 10.59 9.85 9.82
Flashpoint *F 415 420 405 400 445
Fuel %
Antifreeze % 0.0 0.0 0.0 0.0 0.0
Water % 0.0 0.0 0.0 0.0 0.0
Insolubles % 0.2 0.2 0.2 0.3 0.2
I bought the truck with 100,000 miles on it and the original owner had the same usage as I do.. 90% towing. He used PP 5W30 so that's what I used except for one oil change when the parts store didn't have it in stock. Filters are Purolator Pure One.
Code:
Mi on Oil 6300 6000 6300 7400 7300
Mi on Unit 156300 150000 143990 137700 130300
Aluminum 3 4 4 4 4
Chromium 1 1 1 1 1
Iron 20 49 23 32 28
Copper 5 7 7 11 11
Lead 4 2 6 7 12
Tin 0 0 4 0 0
Molybdenum 51 55 57 57 56
Nickel 1 1 1 1 1
Manganese 0 1 1 1 1
Boron 10 1 2 3 4
Silicon 10 9 8 12 9
Sodium 14 5 3 5 5
Calcium 1989 2115 2452 2281 2203
Magnesium 9 9 10 8 12
Phosphorus 550 593 656 685 607
Zinc 636 726 786 793 754
Sus visc @210F 57.8 59.2 61.3 58.7 58.6
cSt Visc @100C 9.60 9.98 10.59 9.85 9.82
Flashpoint *F 415 420 405 400 445
Fuel %
Antifreeze % 0.0 0.0 0.0 0.0 0.0
Water % 0.0 0.0 0.0 0.0 0.0
Insolubles % 0.2 0.2 0.2 0.3 0.2