Found this list for 1500 Midgets from Paul Teglerizer:
long since dead link
Oil Filters to use: Pure One filter, the number model is PL10017, if you're interested. Other filters that might be used are
a.AC-Delco PF-53 (will work on all models of Spit.), PF-13 - requires an adapter
b.Carquest 85084 (said to be a Wix product)
c.Castrol PH922A (all Fram numbers should be same on Castrol filters)
d.Champion D102 (though not recommended)
e.Crossland 573, 595
f.Fram PH2825, PH922A, PH966B, PH16 -may be too large for later 1500's w/air pump
g.Fram PH8A (large can) using the oil filter adapter from MkI 1147 engines, (or non airpump 1500's?)
h.Motorcraft FL-2005, FL-1 (large- non-Air pump Spits only)
i.NAPA 551312 , Gold-1521, Gold 1374
j.Purolator #L10017, PER-1
k.UNIPART GFE150, GFE119
l.WIX 51084
For 1500 Spits:
https://www.triumphexp.com/forum/sp...8/correct-oil-filter-for-75-1500-spit.735502/
https://www.mgexp.com/forum/mg-midget-forum.3/1500-oil-filter-assume-nothing.1667558/
"that filter thing threw me at first too, been a few years, but I remember. Napa, AutoZone, O'Reilly's and others have an adapter fitting for the filter to screw on to. You ought to ask about it next time. It is just more convenient to be able to pick up your oil and filter at a local parts store."