Good lord ....
I forgot to put into my last post my usual caveat that I do NOT intend to, or want to, start a dino vs. synthetic debate, or any other type of "oil war".
But since one is erupting, I would first just like to say that there might be some confusion between AmSOIL and AmWAY. There is no connection between the two. I bought my Amsoil at my local NAPA store, who has been selling it for years. If you were to call them and tell them what you've just said here, they would strongly disagree with you.
I really don't have time for this, but I share the same puzzlement that others have expressed over the hatred for Amsoil. I think that a rational, scientific examination of all of the information available on the subject of lubricants will come away with the conclusion that there are SOME indisputable benefits to using good synthetic oils over dino oil. As I said, I have become convinced that cold weather performance and added protection in case of overheating are two of those benefits. Are these benefits, IF they exist, worth the extra expense involved? Very hard to say, and I'm not saying that they are. Am I trying to convince others of the conclusions that I have reached for myself? Not exactly. Am I trying to give an opinion that I think might be of some value to other owners of diesel-powered vehicles, with the proviso that I don't know everything, and could be wrong? Yes.
Dino oils like Rotella, Delvac, Pennzoil, Amalie, and many others have been protecting diesel engines extremely well for a long, long time. Billions of miles probably. With study after study documenting excellent results. I come not to bury dino oil, but to praise some of the equally well-documented advantages of synthetic oils. There are some advantages, there is no doubt in my mind about it. There are a lot of guys much smarter than I who spend lots of their hard-earned money on it. I encourage people to read all of the excellent posts by GSXR1100. He is not a stupid man, far from it. Talk to some in the racing world, whose livelihoods depend on crossing the finish line. I don't have the facts at my fingertips, but I'm going to go out on a limb here and bet $.05 that most of them use synthetic oil. If so, are they just wasting their money?
Again, to each his own, I'm just trying to share what I have found for myself to be true, because I think it might help others. That's about all there is to it. That's my agenda.
Lastly, and perhaps most importantly - just as I would not put down John Deere tractors as being suitable only for pulling manure spreaders, I would not suggest that someone else's oil of choice is suitable only for starting bonfires. Remarks like that have no place in this forum, or anywhere else. Let's all try to be polite and respectful of one another - I do believe that is Rule Number 1 on this forum's code of conduct.
May all our engines outlive us all, whatever oil we use, and may we all continue to respect each others' choices.
John D.