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Compared to the prior interval, this one was about 4 months shorter, slightly more cold weather starts, and more loaded miles. Comparing to AMSOil: no shear, stayed in-grade for a 40wt. TBN held up better, I suspect owing to a higher starting level. No make-up oil. But, perhaps all for naught...

First time UOA. Appears good to me. Anything notable? I feel like I got my money's worth for this oil change. I also feel pretty safe going 2 full years and upto 14k, though I'll probably do one more OCI at 12k to confirm the data point. Plus I switched to M1 0w40, so I'd like to do an...

Greetings, I have a gasoline Sprinter, ie. Mercedes 3.5L V6. I drive it about 80% highway and it commonly sits for 2-7 days between being driven. The first 3 oil changes were Rotella. The 4th and last was AMS. These were all low sulfur 229.51 oil because I was taking it to shops that...