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but were afraid to ask: 
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Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
twas_brillig
Jedi Knight
Offline
Our BJ7 has an ancient spin-on oil filter adaptor (from AH Spares) that attaches directly to the original canister housing, vs. the adaptors that go to the block.
I did an oil change the other day and discovered I didn't have an extra filter.
My old notes said to use a WIX 5137. However, I found an empty filter box from AH for a Motaquip VFL101 (equivalent WIX is 7098) and the filter on the engine was a WIX 47315.
I sent an e-mail to AH and they advised using a Borg & Beck BFO4077, which equates to WIX WL7098 (using > Oil filter cross reference < ).
Figure I’ll standardize on the WIX WL7098 (or equivalent).
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Some comments from an early post, entitled “100 spin on oil filter part number, no oil pressure after replacement”:
Not all replacements have the anti-drain back valve. To check for this valve look at the filter's small holes. You should see a black baffle behind these holes to prevent the oil from draining out of filter when engine is not running.
The Wix filter I use on both my Healeys is their number 51516 (equivalent to the Fram PH3600 I bought with the first one from Moss). Awhile back I bought a dozen on eBay for about $5/per; they're still available from several suppliers.
Purolator 30001 is what I use with a DW screw on adaptor on my 100.