[DetroitMuscle]

Originally Posted by WikidNinja

Whats the big Difference between Oil. 5W30-20W40 or what else they make. Does it effect preformence, lubrication, what is the real difference, and if there is, which is the best to use?

here you go


http://www.nordicgroup.us/oil.htm#Oil%20Viscosity


got it from
http://www.nordicgroup.us/oil.htm



and another
http://www.performanceoiltechnology....quirements.htm

Its a good rea, alot of links in there as well to help find specific answers.