I'm surprised there isn't more fuel in. Been making mostly short trips and have added a bit of fuel(tuning) to the truck. Thread from old sample
Shell Rotella T 5W/40 (Syn) 2qt make up oil 16,500 Miles on the oil FS 2500 filter Ci-4 and Cj-4 mix
We suggested 13K to 14K-miles for this oil change but you tried 16.5K-miles and wear still looks
pretty good. Iron (steel parts) increased because iron tracks with miles of oil use. 28 ppm is not real high but more than double the universal average. If the iron doesn't bother you, we think you could add another 3,500-5,000 miles to this oil before you change it. Silicon and insolubles were still low showing normal air and oil filtration. No fuel or coolant was present in this sample. Check back for another look at this oil. It's working well for you
ALUMINUM 3
CHROMIUM 1
IRON 28
COPPER 6
LEAD 2
TIN 4
MOLYBDENUM 17
NICKEL 0
MANGANESE 1 0
SILVER 0
TITANIUM 0
POTASSIUM 4
BORON 34
SILICON 11
SODIUM 2
CALCIUM 3025
MAGNESIUM 120
PHOSPHORUS 1181
ZINC 1312
BARIUM 0
cSt Viscosity @ 100°C 71.4
SUS Viscosity @ 210°F 13.44
Flashpoint in °F 435
Fuel % Antifreeze % 0.0
Water % 0.0
Insolubles % 0.3
Shell Rotella T 5W/40 (Syn) 2qt make up oil 16,500 Miles on the oil FS 2500 filter Ci-4 and Cj-4 mix
We suggested 13K to 14K-miles for this oil change but you tried 16.5K-miles and wear still looks
pretty good. Iron (steel parts) increased because iron tracks with miles of oil use. 28 ppm is not real high but more than double the universal average. If the iron doesn't bother you, we think you could add another 3,500-5,000 miles to this oil before you change it. Silicon and insolubles were still low showing normal air and oil filtration. No fuel or coolant was present in this sample. Check back for another look at this oil. It's working well for you
ALUMINUM 3
CHROMIUM 1
IRON 28
COPPER 6
LEAD 2
TIN 4
MOLYBDENUM 17
NICKEL 0
MANGANESE 1 0
SILVER 0
TITANIUM 0
POTASSIUM 4
BORON 34
SILICON 11
SODIUM 2
CALCIUM 3025
MAGNESIUM 120
PHOSPHORUS 1181
ZINC 1312
BARIUM 0
cSt Viscosity @ 100°C 71.4
SUS Viscosity @ 210°F 13.44
Flashpoint in °F 435
Fuel % Antifreeze % 0.0
Water % 0.0
Insolubles % 0.3