This is my 2021 Chevy 3500 DRW L5P Duramax that pulls a 20,000 pound 5th wheel for a combined GVW of 29,500 pounds. I'm still pulling in eighth gear and oil consumption continues to be very low, but not zero. There have been two oil filter changes so far in the OCI, which combined required about 1 quart of oil to bring the level to full. The engine has consumed about 1 quart of oil so far in this 15,450 mile OCI. There has been 2 quarts make-up oil added. We pulled a couple thousand miles into a headwind and in hilly terrain. If you don't want to be "that guy" going 50 MPH on the interstate, then you have to keep your speed up and take the EGTs you get. I did see grade pulls with EGTs as high as 1,350°F for a couple minutes. This OCI sees Fe at 4.2ppm/1k miles vs. 4.6ppm FE/1k miles in the last sample. Silicon increased by 6ppm in over the last OCI, which tells me the air filter is performing well, even though we were in a dusty environment for part of this OCI. TBN retention is very good with a TBN of 12.86 after 15,450 miles and nine months use. The viscosity is virtually the same as brand new oil, this oil doesn't shear.
This oil is in great shape and will be sampled again at 20,000 miles.
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This oil is in great shape and will be sampled again at 20,000 miles.
Sample Information | ||||||||
Sample Date | 6/23/2021 | 07/17/2021 | 8/24/2021 | 4/4/2022 | 7/1/2022 | 8/10/2022 | 1/18/2023 | 4/17/2023 |
Machine Age miles | 2,500 | 2,700 | 8,900 | 16,000 | 21,500 | 21,550 | 31,300 | 37,000 |
Oil Age miles | 2,500 | 200 | 6,400 | 13,500 | 19,000 | 50 | 9,750 | 15,450 |
Machine Time hours | 55 | 62 | 214 | 350 | 495 | 496 | 734 | 882 |
Oil Time hours | 55 | 7 | 152 | 295 | 440 | 1 | 239 | 387 |
Filter Age miles | 2,500 | 200 | 6,400 | 7,100 | 4,000 | 50 | 5,000 | 9,800 |
Oil Changed | Yes | No | No | No | Yes | No | No | No |
Filter Changed | Yes | No | Yes | Yes | Yes | No | Yes | Yes |
Make-up oil | 0 | 0 | 0 | 1.5 qts | 2.5 | 0 | 1 | 1 |
Brand | Factory | HPL | HPL | HPL | HPL | HPL | HPL | HPL |
Viscosity | 15w-40 | 5w-40 CK-4 | 5w-40 CK-4 | 5w-40 CK-4 | 5w-40 CK-4 | 5w-40 CK-4 | 5w-40 CK-4 | 5w-40 CK-4 |
Wear Metals | ||||||||
Iron | 12 | 4 | 36 | 67 | 102 | 16 | 61 | 85 |
Chromium | TD] [TD]TD] [TD]2 | 3 | 4 | TD] [TD]2 | 2 | |||
Nickel | TD] [TD]0 | 0 | TD] [TD]0 | TD] [TD]TD] [TD]TD] | ||||
Titanium | TD] [TD]TD] [TD]TD] [TD]TD] [TD]TD] [TD]0 | TD] [TD]0 | ||||||
Silver | 3 | TD] [TD]TD] [TD]TD] [TD]TD] [TD]TD] [TD]TD] [TD]TD] | ||||||
Aluminum | TD] [TD]0 | 15 | 13 | 14 | 3 | 8 | 9 | |
Lead | 6 | 1 | 2 | 4 | 3 | 1 | 2 | 0 |
Copper | 109 | 28 | 85 | 188 | 203 | 29 | 185 | 197 |
Tin | 6 | 1 | 0 | 6 | 6 | 2 | 2 | 2 |
Vanandium | TD] [TD]0 | 0 | TD] [TD]TD] [TD]TD] [TD]TD] [TD]0 | |||||
Additives | ||||||||
Boron | 120 | 15 | 12 | 21 | 6 | 3 | 14 | 17 |
Barium | TD] [TD]0 | 0 | 0 | 0 | 0 | 4 | 0 | |
Molybdenum | 2 | 514 | 450 | 504 | 537 | 541 | 469 | 574 |
Manganese | TD] [TD]TD] [TD]TD] [TD]1 | 2 | TD] [TD]2 | 2 | ||||
Magnesium | 672 | 995 | 968 | 1008 | 924 | 913 | 831 | 1001 |
Calcium | 1260 | 2439 | 2414 | 2557 | 2459 | 2375 | 2111 | 2722 |
Phosphorus | 1000 | 1099 | 1029 | 1064 | 981 | 973 | 847 | 968 |
Zinc | 1155 | 1179 | 1148 | 1285 | 1233 | 1159 | 1078 | 1292 |
Contaminants | ||||||||
Silicon | 87 | 33 | 48 | 46 | 54 | 18 | 21 | 27 |
Sodium | 7 | 5 | 3 | 3 | 5 | 2 | 5 | 8 |
Potassium | 11 | 2 | 43 | 55 | 59 | 6 | 16 | 21 |
Fuel % | TD] [TD]TD] [TD]TD] [TD]TD] [TD]TD] [TD]TD] [TD]TD] [TD]TD] | |||||||
Glycol | NEG | NEG | NEG | NEG | NEG | NEG | NEG | NEG |
Soot% | 0.1 | 0.1 | 0.4 | 0.6 | 0.8 | 0.2 | 0.6 | 0.7 |
Fluid Condition | ||||||||
TBN | 8.55 | 14.9 | 13.3 | 13.7 | 10.8 | 13.9 | 13.76 | 12.86 |
Viscosity | 13.9 | 14.5 | 13.8 | 14.97 | 14.5 | 14.4 | 14.5 | 14.5 |
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