[Ed Wright]

Joe, an engineer at the Sunoco refinery lab a few miles from my shop, tested filters & posted the results he got on a local board. Wix flowed more, and stopped caught more crap than the others. He was a customer of mine. I gave him one of my System1 filters. I used them, instead of cutting & throwing away the AC filters I had been using. I only used one Fram. Stopped that after cutting the first Fram apart. I was not comfortable with what it looked like.

Anyway, the spare System1 I sent with him did not flow as much as the Wix filters. I did not feel like I needed a flow restriction in my engine's oil system. I was running a dirt track Sprint Car every Fri & Sat nights then. Cheaper than throwing away two cut up Wix filters a week. I was disappointed in the test results. Never hurt any bearings with the System1. May have flowed enough.