Has FG ever started making these for our applications yet? Have they ever really caught on? I put one on my PSD right before I sold in Spring 04, so I never got a chance to see how well it worked. I think it is an intriguing idea at the very least. I also kind of like the Donaldson Endurance Oil Filters as well, but man they aren't cheap. I think the only way I do that is if I went full bypass and used the Endurance full flow for about 50K at a time. I don't know if I could trust an oil filter on my truck for 20K without a bypass!