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Gary, aren't most people saying that the Motorcraft appears to basically be a Purolator Classic with a silicone ADBV?
I dunno. It would be a Ford OEM aftermarket spec filter with a silicon ADBV. A Puro-Classic might be a FL400S minus the silicon and paint.
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Ford may have required the silicone ADBV in order to fight a start up rattle problem on a particular model
That much is assured. I'd venture/wager that the original assembly line filter did not have a silicon ADBV ..and maybe even the aftermarket OEM filter didn't either. At some point (maybe with the original chassis or some future chassis that also used it) that filter proved to produce too many customer complaints that the nickle the bean counter saved cost too much in warranty concerns.
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but a lot of the Motorcraft filters have the more ordinary nitrile one.
Most. I probably haven't seen them all, but the FL820S is the only one that comes to mind at the moment.
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I think the only thing the auto mfg. really cares about is getting the engine to the end of the warranty
I don't think it would be too wise to make cars that grenade .0001 seconds after the warranty expires. The current format for domestics is a 12-15 year life span on the chassis ..and to let the maintenance costs skyrocket for individual repairs (to induce a new or newer purchase).
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In other words, the level of filtration is probably low on the totem pole of things Ford is worried about.
I think the level of is not that important within a given range. Probably
Drive train warranties are pretty long these days. The last thing they would want is for you to follow the recommendations and fail. Think Toyota/Lexus sludge issues. While not a filter specific problem, it was, imo, one that wasn't fudge factored enough and the engines experienced problems too soon in the normal life cycle.
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In other words, the level of filtration is probably low on the totem pole of things Ford is worried about.
Part two.
I think it's low on most totem poles. Even the Euro's (probably- my speculation). If they've got a filter in use out to 18+ months, that thing has got to be pretty loose at the onset of service.
I'm starting to give Dave Newton a bigger slice of our yin:yan pie here. It's going to take a long time for your engine's life to be altered by the incidence of abrasive metal particles that the engine is throwing off (non-wear - just a stray imperfection taking a powder) but the larger combustion byproduct particles need to be kept in check.
That wouldn't be a bad experiment. I might take that up some time in the future.
I think I'll get with dnewton3 ..and maybe Shannow ..see what would be the best way to plug the data escape hatches to see how you can nail down the insoluble production to the wear profile ..without being able to attribute it to some stray metal piece that zings on by every once and a while. Right now my mind is unclear on the proper sequence ..if one exists.