2017 GMC Canyon 2.8 Duramax - RLI Biosyn HD SHP 10w40 - 8200 miles

[CleverUserName]

Haven't driven this thing much since COVID became the new normal. It's a bone stock CCLB 4x4 All Terrain X with 36K miles. Letting it sit, also contributed to the battery going out early. Oil was 19 months old and had ~ 8200 miles on it. Refilled with Delvac 1 ESP 5w40 (CJ-4 Formula) as Biosyn has gotten very expensive in the last few years.

Very low soot % and Manganese is from TDR-FL diesel fuel additive.

 

[wpod]

The new normal.

 

[nutdriver]

Fuel dilution does seem a bit high. Is this vehicle used for more short distance driving? If so that may be a contributor. Otherwise this UOA looks very good.

 

[CleverUserName]

Fuel dilution does seem a bit high. Is this vehicle used for more short distance driving? If so that may be a contributor. Otherwise this UOA looks very good.

Not really. I usually drive a minimum of 20 miles but also use it for trips. Drove 1,000 miles on a trip after the battery was replaced and this sample was taken.

This truck always has around 2% fuel dilution. I assume it's from the stock injection timing as this has the 5th fuel injector mounted in the exhaust for DPF regenerations.

2017 2.8 Duramax - RLI Biosyn HD 10w40 - 8400 mile OCI

Another boring RLI Biosyn analysis. The wear profile is essentially the same as the previous interval of 7800 miles. I was alerted to change the oil at 7500 miles however it was pushed to 8400. I plan to extend it further next time to 9000 miles or one year. I did not do any towing this year...

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