quote:Is this used in all Shell / QS products too, or just Pennzoil. Thanks for all the good info... your "insider tips" makes me glad I am a Pennzoil user.
We are the only oil company that uses Shell-vis 600 for our VI improver. Myself and a lot of others on this board believe this is one of the best, if not the best VI improver out there at this time.
quote:Good point. Actually all your points are good. I was thinking that for a company like EM, they can fool around with various additives while working with race teams for experimentation and then what works best at this level can get put into the retail bottle, of course scaled down significanly. Cost is another factor. I do think EM has a price advantage bc they make many of the additives therefore can and do delive a good bang for the buck with M1. Just my thoughts. Like I have a clue.
Disadvantage: One additive company may suppply one additive or additive package crucial to your operation, therefore commands premium prices and control.