Vehicle Care 9-11What Kind of Engine Oil to UseLook for three things:. GM4718MThis vehicle's engine requires aspecial oil meeting GM StandardGM4718M. Oils meeting thisstandard may be identified assynthetic. However, not allsynthetic oils will meet this GMstandard. Use only an oil thatmeets GM Standard GM4718M.Notice: Using oils that do nothave the GM4718M Standarddesignation can cause enginedamage not covered by thevehicle warranty.. SAE 5W-30SAE 5W-30 is best for thevehicle. These numbers on anoil container show its viscosity,or thickness. Do not use otherviscosity oils such asSAE 20W-50.. American Petroleum Institute(API) starburst symbolOils meeting these requirementsshould have the starburstsymbol on the container. Thissymbol indicates that the oil hasbeen certified by the AmericanPetroleum Institute (API).This vehicle's engine was filled atthe factory with a Mobil 1 ® syntheticoil meeting all requirements for thisvehicle.Substitute Engine Oil: When addingoil to maintain engine oil level, oilmeeting GM Standard GM4718Mmight not be available. You can addsubstitute oil designated SAE 5W-30with the starburst symbol at alltemperatures. Substitute oil notmeeting GM Standard GM4718Mshould not be used for an oilchange.Engine Oil Additives / EngineOil FlushesDo not add anything to the oil. Therecommended oils with the starburstsymbol that meet GM standards areall that is needed for goodperformance and engine protection.Engine oil system flushes are notrecommended and could causeengine damage not covered by thevehicle warranty.