Originally Posted by FogCityM3
Used the 10W-60 and seemed fine, though in retrospect should probably be using something thinner after all the interesting comments (the credible ones that is) from earlier posts. What do you guys think of using Redline 5w-50?
I think, after reading as well, the thinner oil would only benefit the rod bearings, and that's just a theory. As to the other areas of the engine, designed for 10w-60, like the hydraulic lifter assemblies, who knows the effect of thinner weight on those critical areas.