I've read alot on the site about synergyn and was wondering what you guys though about the oil in these 2 vehicles. Im currently running GC the Saturn SL1(previously had amsoil asl 5w30) for UOA comparison. The toyota had amsoil asl 5w30 and now has Mobil1 ss 5w30 in it. Since I have to order a case ill prob run it in both for UOA, but i guess i need to find the one I like and stick with it instead of using a diff oil every change
