quote:Originally posted by Bror Jace:
G-Man II, are you sure about the ester content in the psuedo-synthetic (Group III) oils like Castrol Syntec, Valvoline, etc ...?
Yes. Group III is like PAO in that its solubility is very low so something has to be added to disperse the ad pack. Castrol and most others use esters. Shell in its Rotella T Synthetic uses a hefty dose of Group I (about 13% if I recall).
I don't think that there is anything that is 100% of something. Things always have to be mixed. Additives are always added.
Found this :
MOTRLUBE’s main ingredient, polyalphaolefin, is almost completely harmless to both animal and vegetable life.
MOTRLUBE is free of base mineral oils, recycled base oils and aromatics, the direct causes of sludge, gum and carbon build-up in your engine. When engines remain free of these contaminant-causing components, overall engine performance is greatly increased.