Yeah, I mentioned that I was running over 6 quarts in a 4.0 (because I filled the filter) in that first thread that I linked to. I prefill all the filters regardless of size anyway. I'll use that Wix number you posted and figure out the Mobil1 filter number this weekend, although I think I already know which one it is. The other numbers you listed will also be helpful in IDing the rest of the Wix filters I havesitting around. I really need to start writing applications on the boxes. -Spro -------------- Original message ---------------------- From: "Jim Blair" <carnuck@xxxxxxxxxxx> > A: The 4.0L changed filters at some point ('91 to '93ish) from a 51626 > (metric thread http://tinyurl.com/o5qc6 ) to 51085 (std thread) to match the > Mopar fleet. A 304 CJ should use a 51258 (along with most other AMC V8s). > http://wixfilters.com/filterlookup/index.asp > > There is more to a filter than just the Oring and thread size! If you go to > an oversize filter, I suggest you also prefill it (so the motor isn't > running dry on startup) and get one with an anti-drainback valve (ditto) > Hopefully no-one else will have the heartache of a customer we had last week > who built a new AMC motor and had a Fram collapse (he dutifully changed it > but didn't know chunks of it were jammed inside the oil pump outlet) in less > than 100 miles, making his engine an EXPEN$IVE PO$. > > > From: msproviero@xxxxxxxxxxx > Subject: Re: [AMC-List] best oil filter for a 390? > To: amc-list@xxxxxxxxxxxx > Message-ID: > > <070420060817.4633.44AA24290001481C000012192200737478019D0A0790019D9F9C03@comcas > t.net> > > > I use an oversize Mobil1 filter on everything. Just pulled the > stock application off the shelf and matched the thread/diameter > with the biggest one there. To be honest, my CJ hasn't run in > so long that I forget whether the 304 I swapped in shares the > same filter thread/diameter with the 4.0. Anyway, FYI the big > Mobil1 MI-301 fits the 4.0. If the 4.0 is the same as the V8's > (and 258's), there you go. I'm out-of-town right now, or I > would go out in the barn and verify. > > Before I switched to synthetic in everything, I used Wix. I had > the opportunity to witness a Wix cut open next to a Fram by the > Dana salesman at a parts store I worked at in high school. > > > http://www.greatlakes4x4.com/showthread.php?t=4097 > > http://www.greatlakes4x4.com/showthread.php?t=4101 > > > -Spro > > _________________________________________________________________ > Express yourself instantly with MSN Messenger! Download today - it's FREE! > http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ > > _______________________________________________ > AMC-List mailing list > AMC-List@xxxxxxxxxxxx > http://www.amc-list.com/mailman/listinfo/amc-list > > or go to http://www.amc-list.com _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com