Ok, I first was changing oil every 3000 miles with Mobil 1 5w40 and then it becomes hard to buy. I move to Rotella T 5w40 and just when I am settling in to it up comes CJ-4.

ULSD and CJ-4, will I just be paying more for the oil or should I think about not changing to CJ-4 for our old Benzs?

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In scuba diving and skydiving as in life, if it isn't fun, your doing it wrong.

Original owner & daily driver, 1983 300SD 298,000 miles.