2003-04 Mach 1 Registry Owners Club - View Single Post

nickmckinney · 04-10-2011, 08:52 AM

The tolerances and clearances are no different than the pushrod motors they replaced.

One version being speced for 20W and another for 50W and they have the same clearances internally with many of the same parts should tell you that you can run any viscosity you want in these motors.

The thicker the oil the happier the cam bores, the thinner the oil the happier the cold start gas mileage is what I have seen.

04-10-2011, 08:52 AM	#10
nickmckinney Valve bender backer Join Date: Mar 2011 Location: Orlando Posts: 380	Re: Oil Viscosity for DOHC Ford The tolerances and clearances are no different than the pushrod motors they replaced. One version being speced for 20W and another for 50W and they have the same clearances internally with many of the same parts should tell you that you can run any viscosity you want in these motors. The thicker the oil the happier the cam bores, the thinner the oil the happier the cold start gas mileage is what I have seen.