Technical Service Bulletins
|Publication Date: August 2, 2005|
2003-2006 F-Super Duty
2004-2006 E-Series, F-650, F-750
Some 6.0L equipped 2003-2006 F-Super Duty, 2003-2005 Excursion, 2004-2006 F-650/750 and E-Series vehicles may exhibit a misfire, lack of power, smoke, or slow crank in cold weather on initial start up. This may be due to the oil viscosity being too high. The use of high viscosity multi-grade oil can slow cranking speed more than 30% at -20° F (-29° C), resulting in longer crank times. High viscosity multi-grade oil may delay fuel injection timing by slowing reaction of high-pressure oil control system integral to each injector.
Refer to the oil viscosity chart provided in this TSB. It has been updated and is recommended for all 6.0L DI Diesel model years. Apply the vehicle operating conditions to the oil viscosity chart and select the appropriate viscosity oil grade. Use Motorcraft or 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, CH-4 is acceptable.
|NOTE:||ALSO INCLUDED IN THE CHART IS CLARIFICATION OF THE RECOMMENDED OIL VISCOSITY GRADE TO USE WHEN TOWING A TRAILER.|
Figure 1 – Article 05-16-6
Information Only – Not Warrantable