RE: Eclipse Engine Oil Weight
anywhere from 5w30-20w50 is fine, no way is that too thick in a turbo car that makes so much heat. Basically thinner oil is going have less frictional resistance and *theoretically* give you a couple more usable hp but also burn off faster. Thicker oil will protect a little better and you wont be topping off as often. Take your pick. Id say most just run 10w30.
and http://www.roadraceengineering.com front to back