2010 Ford Mustang Owner's Manual - Page 267

Maintenance and Specifications Adding engine oil 1. Check the engine oil. For instructions, refer to Checking the engine oil in this chapter. 2. If the engine oil level is not within the normal range, add only certified engine oil of the recommended viscosity. Remove the engine oil filler cap and use a funnel to pour the engine oil into the opening. 3. Recheck the engine oil level. Make sure the oil level is not above the normal operating range on the engine oil level dipstick. 4. Install the dipstick and ensure it is fully seated. 5. Fully install the engine oil filler cap by turning the filler cap clockwise 1/4 of a turn until three clicks are heard or until the cap is fully seated. To avoid possible oil loss, DO NOT operate the vehicle with the engine oil level dipstick and/or the engine oil filler cap removed. Engine oil and filter recommendations 4.0L V6 Engine Look for this certification trademark. Use SAE 5W-30 engine oil Only use oils certified for gasoline engines by the American Petroleum Institute (API). An oil with this trademark symbol conforms to the current engine and emission system protection standards and fuel economy requirements of the International Lubricant Standardization and Approval Committee (ILSAC), comprised of U.S. and Japanese automobile manufacturers. To protect your engine and engine's warranty, use Motorcraft SAE 5W-30 or an equivalent SAE 5W-30 oil meeting Ford specification WSS-M2C929-A. Refer to Maintenance product specifications and capacities later in this section for more information. 267