RTU OIL FILTER

I manage a NAPA Auto Parts store. We stock WIX filters (NAPA made by WIX). Our old part number for the oil filter was 1108 and WIX's number was 551108. NOW WIX has changed to a 557208 and NAPA is 7208. It is a SOCK filter and it won't fit in the housing. Is there a NEW number or something that will fit?

There are adapters that will permit a spin on. I think a big block GM filter is used. But the question I have is what direction is the flow of oil through the filter. Does the filter accept oil flow in either direction?

Welters Farm Supply has the correct filters. 417-498-6496.

Roger, You have to use the small block Chevy filter that DOES NOT have the drain back valve in it. The oil does go through in the opposite direction from GM flow. I am thinking the NAPA number is 1061, but do your own checking, it may be 1060.

I have had one on Dad's ZB ever since the old filters became hard to come by and no problems except maybe next time I change it I will try to prime the filter with a little oil so the engine oil pressure comes up a bit quicker.

This year I have been running Kawasaki 30wt. in it because it still has the zinc in it and I am under the impression zinc helps oil cling to the internal parts of the engine.

t.r.k.,
I can only speak about the adapters I sell. Other adapters are designed differently.

I recommend the NAPA #1061 filter for use with the #60A23 adapter. The #1061 is the classic filter that first replaced the Chevy canister filters, on the mouse motors. It has no backflow valve and has shown superior results in testing. It has excellent results for ten micron filtration. It is as common as dirt, and it is cheap to buy.

The oil filter does not determine the initial oil pressure, on startup, on MM engines. The filter is supplied with excess oil after the engine pressure is satisfied. The filter also has its own low pressure release system to keep filter canister pressure much lower than the engine oil pressure.The oil jute canister filters would crush in the canister if pressures climbed on a dirty filter element.

Classic GM engines flow oil from the center outward when filtering, while MM engines flow oil through filters from the outer areas to the center. MM engines flow oil in this manner because when Purolator invented the oil filter, there was only a stack of F5 felt washers to perform filtration. When the operator removed the filter bottom drain; the oil flow was reversed in the filter to push the trash off of the felt faces. The flow direction was retained when disposable filters came on the scene. The reverser feature was dropped as it became unnecessary.

GM flows the oil from the core outward to lessen the possibility of a filter canister blowout. Unfortunately that little idea gets lost in the real world. I have experienced many spin on canisters blow from poor manufacture. The AC filters that were sold by WallyWorld about fifteen years ago were particularly fond of developing pin holes near the riffled area of the outer canister. Fram also supplied crap spin on filters too. I almost lost a 258 Jeep motor when the Fram filter decided to blow at the roll seam.

For many moons I have sworn off Fram and AC filters. I have tested WIX/NAPA filters to pressures that make the outer can straighten out, but none have blown. That is why I use WIX/NAPA filters.

As of the current time; I have been told that most of the diesel grade oils still contain zinc. The EPA has ruled that zinc must go away very soon. I only use diesel grade oils in everything from lawn mowers on up. Expensive oil is cheaper than overhauls.

Happy motoring.
Charlie at
Moline Parts