Adding Equipment to the Outside ofYour VehicleThings you might add to the outside of your vehicle canaffect the airflow around it. This may cause wind noiseand affect windshield washer performance. Check withyour dealer before adding equipment to the outsideof your vehicle.FuelThe 8th digit of your vehicle identification number (VIN)shows the code letter or number that identifies yourengine. You will find the VIN at the top left of theinstrument panel. See Vehicle Identification Number(VIN) on page 5-102.Gasoline OctaneIf your vehicle has the 2.8L V6 engine (VIN Code T),use regular unleaded gasoline with a posted octanerating of 87 or higher. If the octane rating is less than 87,you may notice an audible knocking noise when youdrive, commonly referred to as spark knock. If thisoccurs, use a gasoline rated at 87 octane or higheras soon as possible. If you are using gasoline rated at87 octane or higher and you hear heavy knocking,your engine needs service.If your vehicle has the 3.6L V6 engine (VIN Code 7),use regular unleaded gasoline with a posted octanerating of 87 or higher. For best performance or trailertowing, you may choose to use middle grade 89 octaneunleaded gasoline. If the octane rating is less than 87,you may notice an audible knocking noise whenyou drive, commonly referred to as spark knock. If thisoccurs, use a gasoline rated at 87 octane or higheras soon as possible. If you are using gasoline rated at87 octane or higher and you hear heavy knocking,your engine needs service.5-5
