Originally Posted by iansoutham

A Zetec oil filter (EFL600) will be absolutely fine. They are a little longer and have a non-return valve fitted internally.

I buy the EFL600 filters by the pack. I use them on my CVH, 1.25 Fiesta (makes them easier for clearance when removing), DOHC (should be an EFL90) and have never had a problem yet.