Oil pressure

[cycleguy55]

Originally Posted by SBSerpent

That being said, is it best to always go with a longer (higher capacity) filter than a shorter (lower capacity) filter?

A higher capacity filter is capable of filtering more contaminants before its internal pressure relief valve opens and oil bypasses the filtering media. So, yes, generally a longer filter is preferred to a shorter filter - all else being equal.

BTW, Wix 51515 is a good filter, equivalent to Motorcraft FL-1A IMO.

[SBSerpent]

Yes, the 51515 is what I am using. I had swapped out to the WIX 51068, which is almost an inch shorter in length but then figured I didn't need to because the 51515 fits between the motor and frame no problem.

[patrickt]

If you're worried about low oil pressure then you should buy an FE. With FEs, there's no such thing as low oil pressure. See: Oil Temp 265 Degrees and Pressure Only 9 PSI -- Did Ford Say That Was OK for a 427?