From a lot of years of opening up oil filters as teaching aids, I've found two filters that stand head and shoulders above the rest. WIX is tops, by a large margin. More commercial truck fleets use WIX than most of the other brands combined. Next best is NAPA, probably because WIX builds them and puts the NAPA name and part number system on the canister. Next, also used a lot by the over the road truck fleets is Baldwin. Fram, Purolator, Motorcraft, AC, etc.- - - -not enough difference to matter. Walmart and the other house-brand filters, low-bid orders filled by whichever major manufacturer happens to get the contract. No-name house brand filters are a crapshoot but they're better than none at all.
Jerry

Last edited by Hotrod Lincoln; 12/21/2013 4:17 AM.
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