Canadian tire - engine oil customer reviews - product, Canadian tire product reviews and customer ratings for engine oil. read and compare experiences customers have had with engine oil products. Bob oil guy, Fuel additives without pea often contain a different ingredient called piba that clean carburetors and indirect port injectors. at high concentrations it can clean. Valvoline 20w-50 4-stroke conventional motorcycle oil, 1qt, Valvoline 20w50 4-stroke motorcycle oil: protects at high rpms and temperatures; protects wet clutch and provides maximum power transfer; prevents deposit formation.