![]() STP S10600 and S10600XL sold at autozone – the regular and the medium grade are made in USA with ok quality. I will go over few brands here that I found to be exact oem filter and made in Germany Never knew when going to oreily can get you oem filter. The video is long but if you watch you will see that for Example Purolator Or STP have improved filter with synthetic media while Carquest, Napa, Bosch, WIX, Microguard and few others have the Original oem filter inside. I made a little bit boring video but better than nothing. And I found 2 better filter (there might be few more too) Looks like there are quite a lot of other brands the “outsource” their filter for the 2.0 engine directly from MANN. Did you think the MANN oil filter is second best after the OEM filter? Most of the VW Audi peope i know do the same. I was thinking the only other filter i would use is the MANN. STP S25 (also made by Champion labs and identical to the AC Delco inside).I usually do not write much in forums but i think i got some very important clue. If you make the mistake of getting one, fill your engine with 5 quarts regardless of the dipstick reading because the level will drop by 2 quarts once the engine starts instead of the proper 1 quart drop. That is dangerously close to sucking air.Īnd that is why so many people complain about the AMC V8 lubrication system.Ĭommon versions of the Wix 51258 include:ĭon't buy them. You are running with 2 quarts in the oil pan assuming your oil level was at the "full" mark to begin with! If you were at the "add" mark, you only have 1 quart in the oil pan. Now once the engine starts, one of those quarts has to fill the oil filter and pump and roughly one more quart is up in the cylinder heads. The 4 quarts in the oil pan to reach the "full" mark is all the oil you have. But.with a faulty ADV, you don't have that extra quart of oil trapped in the filter and pump with the engine off. Roughly 1 quart is trapped up in the heads while the engine is running, so the oil level in the pan on a running engine is roughly 3 quarts. Since the ADV is supposed to hold another quart in the oil filter and pump, the engine's full oil capacity is 5 quarts. The "full" mark on an AMC V8 dipstick indicated 4 quarts of oil in the pan. During that time, the engne is running with only the layer of oil that was clinging to the parts from the last time it ran. ![]() The obvious consequence of a faulty ADV is air in the filter and pump, which takes a few seconds to purge when the engine is started. That way, the engine has immidiete oil pressure when it is restarted. The purpose of the ADV is to prevent the oil inside the oil filter and pump from draining back into the oil pan after the engine is shut off. The anti-drainback valve (ADV) inside the filter is defective and does not seal. Wix (Napa) filters were some of the best in the industry for the most part, but the 51258 designed for AMC engines has a definite defect. I looked at every filter I sold with a scrutinizing eye for "would I put this on my own car?". I worked as a Napa counter parts salesman for several years and stand by Napa's products, especially their filters. ![]() I have been saying that for years and people just blew me off. All versions of the WIX 51258 line of filters have a faulty anti-drainback valve.
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