This message isn't about a specific motor oil and I hope a moderator does not move it. What it is about is trying to salvage a wealth of insight and experience for the remainder of us who learn from this forum. Doug Hillary's massive experience with fleet trucks, innumerable OCIs, preventative maintenence programs and candid "no **" attitude was an asset and it is a monumental shame that he does not contribute to this forum any longer. I always found his posts well written, to the point,factual and usually backed up by hard data. Personally, it was Dougs comments on HDEO engine oil that promted me to successfully use it in gas motors. I would like to thank him for that.