2006 Ford F350 6.0 Liter Diesel Supplement 3rd Printing - Page 38
2006 Ford F350 Manual
Page 38 highlights
Maintenance and Specifications Engine oils with improved fuel economy properties (energy conserving) are currently available. If you use an energy conserving oil, be sure it meets the recommended Ford Specification, API service categories and SAE viscosity grades listed in the Lubricant and Maintenance Materials Specifications chart. Some energy conserving oils do not meet the requirements necessary for your diesel engine. The use of correct oil viscosities for diesel engines is important for satisfactory operation. From the SAE viscosity grade chart following, determine which oil viscosity best suits the temperature range you expect to encounter for the next service interval. *15W-40 recommended for trailer towing. A symbol has been developed by the American Petroleum Institute (API) to help you select the proper engine oil. It will be included on the oil container you purchase. The top section of the symbol shows the oil performance by the API designation. This should match the owner guide recommendation. The center section will show the SAE viscosity grade. The lower section will state energy conserving if the oil has proven fuel saving capabilities. 38 2006 Econoline (eco) Supplement USA (fus)