I have been running the FL1-HPs on my Plymouth for awhile and have purchased Wix filters because of cost,I have 51515 and 51515R filters. I know the microns and flow rates are different between the two, but I'm looking for some input. shruggy
My car usually gets an oil change once a year. I doubt I put more than 300 street miles on it and maybe 30-40 passes down the track a year.

72 Plymouth Roadrunner 11.08@123.25