Hey guys I just bought a 2010 Toyota corolla, My 2011 yaris was struck in the rear and totaled Monday . Anyways the 1.8l engine has stamped on its fill cap 0w-20 or 5w-20 Will I notice any if at all performance (gas mileage) between the two? also Is there any benefit to running one over the other? does 5w-20 protect any better than 0 weight oil? Thanks Sean P.S. My stepdad has a 2010 Toyota Camry and it says only 0w-20 does anyone know if 5w-20 can be used in that car or not?