2009 Ford Mustang Shelby GT500 Supplement 1st Printing - Page 22

Maintenance and Specifications ENGINE OIL RECOMMENDATION Use Motorcraft SAE 5W-50 full synthetic or an equivalent SAE 5W-50 full synthetic oil meeting Ford specification WSS-M2C931-B. Do not use supplemental engine oil additives, cleaners or other engine treatments. They are unnecessary and could lead to engine damage that is not covered by Ford warranty. Change your engine oil and filter according to the appropriate schedule listed in the scheduled maintenance information. ENGINE AND INTERCOOLER COOLANT The concentration and level of engine coolant should be checked at the mileage intervals listed in the scheduled maintenance information. The coolant concentration should be maintained at 50/50 coolant and water, which equates to a freeze point of -36°C (-34°F). Coolant concentration testing is possible with a hydrometer or antifreeze tester (such as the Rotunda Battery and Antifreeze Tester, 0014-R1060). The level of coolant should be maintained at the "cold fill range" level in the coolant reservoir. If the level falls below, add coolant per the instructions in the Adding engine coolant section. Your vehicle was factory-filled with a 50/50 engine coolant and water concentration. If the concentration of coolant falls below 40% or above 60%, the engine parts could become damaged or not work properly. A 50/50 mixture of coolant and water provides the following: • freeze protection down to -36°C (-34°F). • boiling protection up to 129°C (265°F). • protection against rust and other forms of corrosion. • an accurate temperature readout from the engine coolant gauge. 22 2009 05+ Mustang (197) Supplement USA (fus)