Originally Posted by bullwinkle
Originally Posted by KP_Texan
My only concern with the Wix 57502 was the listed bypass pressure of 22 psi since I've read varying specs on the FL500S bypass pressures being from 8-18 psi. I gave Wix CS a call to discuss this and basically the answer I got was that the 57502 is designed to exactly replicate the FL500S' bypass behavior. He said they don't simply talk to Motorcraft/Purolator etc. to get their bypass pressure rating and then design the filter that way. They actually get a number of FL500S themselves, and then bench test them to determine how the bypass works, and then they engineer their design from that.
Of course, I take this info with a grain of salt, but I suppose it makes me feel good enough to use the 57502s that I've already bought. Granted, my filters don't have a thread end bypass (Date code of 121018), but I'm not overly concerned about that.
Not sure why Motorcraft/Purolator/Mann & Hummel wouldn't give that information directly to Wix/Mann & Hummel. considering they're the SAME COMPANY! This is the kind of misinformation that makes people not believe anything M&H says!
Maybe because the 57502 was in Wix's catalog prior to their 2016 acquisition by Mann+Hummel? Other than that, I have no idea.