Blackstone report for my '04 GMC Sierra w/6.6L Duramax.
Miles on oil: 9976
Miles on engine: 121,345
Oil Filter: Mobil 1 M1-303
Air Filter: AC Delco
Oil added: 1/2 quart
Aluminum: 2
Chromium: 1
Iron: 8
Copper: 2
Lead: 1
Tin: 1
Molybdenum: 3
Potassium: 5
Boron: 1
Silicon: 6
Calcium: 3042
Magnesium: 17
Phosphorus: 1072
Zinc: 1227
(All other values: 0)
SUS Visc @ 210: 75.1
Flashpoint: 395
Fuel %: 1.5
Insolubles %: 0.2
TBN: 9.8
I'm not real happy with the flashpoint & fuel %, but Blackstone's comments were: "1.5% of the sample was fuel (usually from idling/city driving) but it didn't hurt anything. Try 11,000 miles for the next sample. Great engine!"
I'm not a big fan of Rotella Synthetic, but it's hard to beat for a 5w-40 from a price/availability standpoint. And it certainly held up well this time. I have M1 T&SUV in the engine now, but will switch back to Delo in the spring.
Miles on oil: 9976
Miles on engine: 121,345
Oil Filter: Mobil 1 M1-303
Air Filter: AC Delco
Oil added: 1/2 quart
Aluminum: 2
Chromium: 1
Iron: 8
Copper: 2
Lead: 1
Tin: 1
Molybdenum: 3
Potassium: 5
Boron: 1
Silicon: 6
Calcium: 3042
Magnesium: 17
Phosphorus: 1072
Zinc: 1227
(All other values: 0)
SUS Visc @ 210: 75.1
Flashpoint: 395
Fuel %: 1.5
Insolubles %: 0.2
TBN: 9.8
I'm not real happy with the flashpoint & fuel %, but Blackstone's comments were: "1.5% of the sample was fuel (usually from idling/city driving) but it didn't hurt anything. Try 11,000 miles for the next sample. Great engine!"
I'm not a big fan of Rotella Synthetic, but it's hard to beat for a 5w-40 from a price/availability standpoint. And it certainly held up well this time. I have M1 T&SUV in the engine now, but will switch back to Delo in the spring.