2006 Ford F250 6.0 Liter Diesel Supplement 3rd Printing - Page 37
2006 Ford F250 Manual
Page 37 highlights
Maintenance and Specifications Engine oil specifications To help achieve proper engine performance and durability, it is important that only engine lubricating oils of the proper quality are used in your diesel engine and that the engine oil is changed no later than the recommended interval. Diesel engines require specially formulated oil to resist contamination. Proper quality oils also provide maximum efficiency of the crankcase ventilating system which reduces air pollution. For normal or severe service, use Motorcraft oil or an equivalent oil conforming to Ford Specification WSS-M2C171-D or API Service categories CI-4 PLUS, CI-4/SL or DHD-1. If CI-4 PLUS oil is not available CI-4 or CH-4 is acceptable. 37 2006 Econoline (eco) Supplement USA (fus)