Quote:
Originally posted by Early_S_Man
That letter from Amsoil seems a bit disingenuous!
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Well, it
did come from an Amsoil employee....
I sent them my request for information within a few minutes of starting this thread. I just received the reply today and posted it.
Just to be clear, I am not trying to say that Swepco is bad. In almost every application, synthetic oils are touted as being superior - and echo what the Amsoil guy says (synthetic will withstand more heat and resist oxidation longer than petroleum).
I genuinely want to be sure that my 915 goes back together and is filled with the best fluid possible. Most of what I have seen in threads is anecdotal evidence and the old "I use it because it works".
Swepco may indeed be the best choice, but I still want to know why in this application a mineral oil is better than a synthetic. Is it strictly because of the brake-bands?
And if so, why does synthetic not screw up Dana Power Lok rear differentials - which rely on the friction of small clutch discs to provide the limited slip function?
Again - I'm not saying all you people are wrong. I'm saying, If I'm wrong then help me really understand why.
Edit: This was being written while Geary and Randy were responding.