Wix makes good filters. They make most of the filters NAPA sells as well. I have no problem with Wix filters.
BUT.... a cross-reference usually is only a FITment reference. The actual filter performance can be Very Different than the performance specified by the machine mfr’r. A cross-referenced filter can be like a BOLT.... There may be a lot of different bolts that fit a hole... Grade 2... Grade 5.... Grade 8 .... It matters what the design purpose is. Does that bolt merely hold on a piece of decoration? Or does it work against “shear”? Or does it hold high “tension” loads accompanied by friction...??
The WIX 51334 (and it’s twin the NAPA 1334) are only 21-Micron filters. While that will certainly catch things large enough to have their part-numbers printed on them... it isn’t exactly a “fine” filter.
And what about the By-Pass valve? At what pressure does the Wix by-pass unfiltered oil back to the engine? What fluid Flow-Rate can it handle..?? ....and how does that compare to the OEM filter specifications?
Just sayin’..... there’s more to know than simply if it can be screwed onto the engine.
You are correct, I should have used the Wix filter lookup as a Link
Wix it has all of the information and specifications for the filters they mfg (See below). I pulled the trigger too quick on my lookup source.
My problem with Kubota and the dealers is they all say (Recommend) use genuine Kubota filters but you can't find any specifications for those filters. Kubota is not alone in not sharing specifications, John Deere, Kioti, Case, Subaru all do the same. Lubricants are the same story. It must be very profitable for Kubota and its Dealer network not to provide this information.
Companies like Wix, Baldwin, Donaldson etc. have tested the Kubota filters and guarantee what they sell meets or exceeds the MFG specifications.
In researching my response I found that Wix recommends 51307 for my new 4760. I think the tier 4 rating of the engine changed some of the ratings. It is also backward compatible for my non tier 4 equipment.
Page 2 of specifications.