Originally Posted By: dnewton3
Do NOT use the "super duty" in your Dmax; it is only CF rated. It is fine for use in gassers.
You can use the "extreme duty" with no issues in you LBZ.
VERY IMPORTANT This 10W-30 is the wrong oil for your diesel engine.
About Wolf's Head brand...this is one of the brand names that has been bought & sold. It means nothing except the standing of the company behind it. In any case, the formulation of all the oils has been changed over the years, so past results are a poor indicator of future results. If you trust Amalie, great, buy Wolf's Head. If you want Wolf's Head 'cuz granpappy used it, research deeper. Ditto for Havoline, and Pennz, and Kendall, and many other brand labels. (By the way, I like all except the WH, and that's because I know nothing about Amalie.)