Black plate (62,1)Cadillac ATS Owner Manual - 2013 - crc - 6/5/129-62 Driving and OperatingRecommended FuelIf the vehicle has a 2.5L L4 engineor a 3.6L V6 engine, use regularunleaded gasoline with a postedoctane rating of 87 or higher. If theoctane rating is less than 87, anaudible knocking noise, commonlyreferred to as spark knock, might beheard when driving. If this occurs,use a gasoline rated at 87 octane orhigher as soon as possible. If heavyknocking is heard when usinggasoline rated at 87 octane orhigher, the engine needs service.If the vehicle has the 2.0L L4engine, use premium unleadedgasoline with a posted octane ratingof 91 or higher. You can also useregular unleaded gasoline rated at87 octane or higher, but thevehicle's acceleration could beslightly reduced, and a slight audibleknocking noise, commonly referredto as spark knock, might be heard.If the octane is less than 87, aheavy knocking noise might beheard when driving. If this occurs,use a gasoline rated at 87 octane orhigher as soon as possible.Otherwise, you could damage theengine. If heavy knocking is heardwhen using gasoline rated at87 octane or higher, the engineneeds service.Gasoline SpecificationsAt a minimum, gasoline should meetASTM specification D 4814. Somegasolines contain anoctane-enhancing additive calledmethylcyclopentadienyl manganesetricarbonyl (MMT). We recommendagainst the use of gasolinescontaining MMT. See Fuel Additiveson page 9‑63 for additionalinformation.California FuelRequirementsIf the vehicle is certified to meetCalifornia Emissions Standards, it isdesigned to operate on fuels thatmeet California specifications. Seethe underhood emission controllabel. If this fuel is not available instates adopting California EmissionsStandards, the vehicle will operatesatisfactorily on fuels meetingfederal specifications, but emissioncontrol system performance mightbe affected. The malfunctionindicator lamp could turn on and thevehicle might fail a smog‐check test.See Malfunction Indicator Lamp onpage 5‑14. If this occurs, return toyour authorized dealer for diagnosis.If it is determined that the conditionis caused by the type of fuel used,repairs might not be covered by thevehicle warranty.Fuels in ForeignCountriesNever use leaded gasoline or anyother fuel not recommended in theprevious text on fuel. Costly repairscaused by use of improper fuelwould not be covered by the vehiclewarranty.InformationProvidedby:
