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Old 03-07-2005, 12:14 AM   #12
mach1fan35
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Join Date: Oct 2004
Location: Chicago Illinois
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Re: Important Information About Mobile 1 Synthetic Motor Oil For Mach 1's

Quote:
Originally Posted by DanK
I wouldn't use the 5w30. The reason Ford says 5w20 is to get oil to the cam journals quickly, also the thinner weight oil will delay lifter pump up (i.e. valve float as a result). I doubt anyone will reach the rpm it takes to bring on float with 5w30 though. I think around 7000rpms. Just use what Ford recommends to be safe. Btw, no problems using 0w20 here. Same protection on these close tolerance engines. It's not like the old days. Besides, on startup, I want oil to get to every part of engine as quickly as possible to prevent wear, which in turn, will increase tolerances.
I completely agree with you DanK. But what now? how many cases of 0w20 do you have stashed? I only have 2 left.
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