Black plate (48,1)Cadillac SRX Owner Manual - 20119-48 Driving and OperatingIf the vehicle has the 2.8L V6 engine(VIN Code 4), use premiumunleaded gasoline with a postedoctane rating of 91 or higher.For best performance, usepremium unleaded gasoline with aposted octane rating of 93. In anemergency, you can use regularunleaded gasoline with an octanerating of 87 or higher. If 87 octanefuel is used, do not perform anyaggressive driving maneuvers suchas wide open throttle applications.You might also hear audible sparkknock during acceleration. Refillthe tank with premium fuel as soonas possible to avoid damaging theengine. If heavy knocking is heardwhen using gasoline rated at91octane or higher, the engineneeds service.Gasoline SpecificationsAt a minimum, gasoline shouldmeet ASTM specificationD 4814 in the United States orCAN/CGSB‐3.5 or 3.511 in Canada.Some gasolines contain anoctane-enhancing additive calledmethylcyclopentadienyl manganesetricarbonyl (MMT). We recommendagainst the use of gasolinescontaining MMT. See Fuel Additiveson page 9‑49 for additionalinformation.California FuelRequirementsIf the vehicle is certified to meetCalifornia Emissions Standards,it is designed to operate on fuelsthat meet California specifications.See the 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 5‑19. 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.
