2014 Ford Mustang Shelby GT500 Supplement Printing 1 - Page 41

Maintenance 7. Add prediluted coolant to the coolant reservoir until the coolant level is between the MIN and MAX marks on the reservoir. 8. Reinstall the pressure relief cap. 9. Check the coolant level in the reservoir before you drive your vehicle the next few times (with the engine cool). 10. If necessary, add prediluted coolant to the coolant reservoir until the coolant level is between the MIN and MAX marks on the reservoir. Whenever coolant has been added, the coolant level in the coolant reservoir should be checked the next few times you drive the vehicle. If necessary, add prediluted coolant to bring the coolant level to the proper level. If you have to add more than 1.0 quart (1.0 liter) of coolant per month, have your dealer check the cooling system. Your cooling system may have a leak. Operating an engine with a low level of coolant can result in engine overheating and possible engine damage. ENGINE SPARK PLUG INTERVAL To keep your high performance engine operating at peak performance, the spark plug service interval is every 45000 miles (72000 kilometers). See the Motorcraft® Part Numbers chart for the specific spark plug application. OCTANE RECOMMENDATIONS Premium unleaded gasoline with an (R+M)/2 octane rating of 91 or higher is required. SVT recommends using unleaded gasoline with octane (R+M)/2 METHOD rating of 93 or higher for optimal performance of this vehicle. Recommended fuel is an important part of the proper maintenance and optimal performance of this vehicle. The use of gasoline with an octane rating lower than 91 can lead to severe mechanical damage to your vehicle, may degrade vehicle performance, and may affect your warranty coverage. 91 40 2014 05+ Mustang (197) Supplement, 1st Printing, December 2012 USA (fus)