The standard replacement oil filter for the spin on setup would be an AC PF-24 filter, other would be the longer PF-31 which is no longer available but the Fram PH-11 would be the same for a little more capacity over the PF-24. I use a 1 1/2 quart capacity filter from Wix #51831 also 1831 from NAPA, it's actually a filter for hydraulic equipment but is exactly the same as automotive filters.
