I just bought the truck in February and dropped the oil right away. The truck was sitting for about 3+ years and the previous history is unknown. This Oil was in about 5 months. Mostly highway. There's about 300 miles on this towing 8,000lbs.
Blackstone comments: Buck looks great, based on data from testing. Universal averages show typical wear levels for this type of engine after about 5,300 miles on the oil. This oil was in use a shorter duration than that, and suitably, wear metals were low and in accord with averages. This shows no evident problems developing at parts sharing the oil. The TBN of 7.5 is strong, showing lots of oil additive still active. No moisture, coolant, or excess fuel was noted. Try 6,500-7,000 miles on the next oil and resample to monitor.
Miles on oil: 4,743
Miles on Unit: 39,943
Makeup oil: 0
ALUMINUM - 2
CHROMIUM - 1
IRON - 10
COPPER - 2
LEAD - 3
TIN - 0
MOLYBDENUM - 43
NICKEL - 1
SILVER - 0
TITANIUM - 0
POTASSIUM - 4
BORON - 87
SILICON - 12
SODIUM - 4
CALCIUM - 1298
MAGNESIUM - 975
PHOSPHORUS - 886
ZINC - 1162
BARIUM - 0
cSt Viscosity @ 100°C - 12.55
SUS Viscosity @ 210°F - 68.5
Flashpoint in °F - 420
Fuel % - Antifreeze % - 0
Water % - 0
Insolubles % - 0.3
TBN - 7.5
Blackstone comments: Buck looks great, based on data from testing. Universal averages show typical wear levels for this type of engine after about 5,300 miles on the oil. This oil was in use a shorter duration than that, and suitably, wear metals were low and in accord with averages. This shows no evident problems developing at parts sharing the oil. The TBN of 7.5 is strong, showing lots of oil additive still active. No moisture, coolant, or excess fuel was noted. Try 6,500-7,000 miles on the next oil and resample to monitor.
Miles on oil: 4,743
Miles on Unit: 39,943
Makeup oil: 0
ALUMINUM - 2
CHROMIUM - 1
IRON - 10
COPPER - 2
LEAD - 3
TIN - 0
MOLYBDENUM - 43
NICKEL - 1
SILVER - 0
TITANIUM - 0
POTASSIUM - 4
BORON - 87
SILICON - 12
SODIUM - 4
CALCIUM - 1298
MAGNESIUM - 975
PHOSPHORUS - 886
ZINC - 1162
BARIUM - 0
cSt Viscosity @ 100°C - 12.55
SUS Viscosity @ 210°F - 68.5
Flashpoint in °F - 420
Fuel % - Antifreeze % - 0
Water % - 0
Insolubles % - 0.3
TBN - 7.5