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I run Amsoil AME 15w-40 CI-4+ oil still. I change it once a year, which is 9-13K miles. Great UOA. I'll likely try the new Amsoil DME this next oil change.
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You found Valvoline CI-4 last year? I haven't seen it in a decade. Never mind, the photo didn't load earlier and now I see it's CJ-4 vs CK-4. CK is a good spec, from what I can tell
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Noted. The ~10 NOACK doesn't bother me as much as it should, as I'm ok with makeup oil if needed. I use about a pint of HDD between annual oil changes; never bothered topping
I know this should start a interesting debate but I’m curious everybody’s opinion....
I want to change the oil in my Cummins turbo, curious what brands you guys recommend, previous owner ran Rotella 15 W 40 and change the oil every 7 to 10,000 miles, he also ran a quart of Lucas at every oil change, my question is what are you guys thoughts about running a full synthetic and which brand?