This is a 2021 Chevy 3500 DRW L5P Duramax that pulls a 20,000 pound 5th wheel for a combined GVW of 29,000 pounds give or take a dog or two. The current sample has about 6,000 miles of towing and 400 miles of local sight seeing. I know that's not a very good towing vs sight seeing ratio, but there were a couple special purpose non-sight seeing trips towing the trailer. We'll do better in the future The fuel consumption towing was 650 gallons which yielded an average of 9 MPG, this engine works hard almost all the time. There where two trips through the tunnels on I-70 west of Denver. 50 MPH @ 2,100 RPM and 2 MPG on the way up and 35 MPH with exhaust braking at 3,500 RPMs on the way down.
The additional Fe in the oil was at a rate of 4.8PPM/1k miles and the Al was added at a rate of 2.3PPM/1k miles and is indicative of wear-in. The Si seems to be coming from engine seals or gaskets and has decreased considerably compared to the factory oil. The K is strange, but Glycol is NEG, so we'll just watch the numbers over time.
Lab is Wearcheck
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The additional Fe in the oil was at a rate of 4.8PPM/1k miles and the Al was added at a rate of 2.3PPM/1k miles and is indicative of wear-in. The Si seems to be coming from engine seals or gaskets and has decreased considerably compared to the factory oil. The K is strange, but Glycol is NEG, so we'll just watch the numbers over time.
Lab is Wearcheck
Sample Information | |||
Sample Date | 6/23/2021 | 07/17/2021 | 24 Aug 2021 |
Machine Age miles | 2,500 | 2,700 | 8,900 |
Oil Age miles | 2,500 | 200 | 6,400 |
Machine Time hours | 55 | 62 | 214 |
Oil Time hours | 55 | 7 | 152 |
Filter Age miles | 2,500 | 200 | 6,400 |
Oil Changed | Yes | No | No |
Filter Changed | Yes | No | No |
Make-up oil | 0 | 0 | 0 |
Brand | Factory | HPL | HPL |
Viscosity | 15-40 | 5w-40 | 5w-40 |
Wear Metals | |||
Iron | 12 | 4 | 36 |
Chromium | TD] [TD]TD] [TD]2 | ||
Nickel | TD] [TD]0 | 0 | |
Titanium | TD] [TD]TD] [TD]TD] | ||
Silver | 3 | TD] [TD]TD] | |
Aluminum | TD] [TD]0 | 15 | |
Lead | 6 | 1 | 2 |
Copper | 109 | 28 | 85 |
Tin | 6 | 1 | 0 |
Vanandium | TD] [TD]0 | 0 | |
Additives | |||
Boron | 120 | 15 | 12 |
Barium | TD] [TD]0 | 0 | |
Molybdenum | 2 | 514 | 450 |
Manganese | TD] [TD]TD] [TD]TD] | ||
Magnesium | 672 | 995 | 968 |
Calcium | 1260 | 2439 | 2414 |
Phosphorus | 1000 | 1099 | 1029 |
Zinc | 1155 | 1179 | 1148 |
Contaminants | |||
Silicon | 87 | 33 | 48 |
Sodium | 7 | 5 | 3 |
Potassium | 11 | 2 | 43 |
Fuel % | TD] [TD]TD] [TD]TD] | ||
Glycol | NEG | NEG | NEG |
Soot% | 0.1 | 0.1 | 0.4 |
Fluid Condition | |||
TBN | 8.55 | 14.9 | 13.3 |
Viscosity | 13.9 | 14.5 | 13.8 |
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