well I almost made it 2 years--15 days shy-- without a problem with my custom gravity fed fuel system---yep I lost a filter-now you thought I was going to say pump--admit it---that dern thing just went and clogged up on me and sent my pressure to -5psi when trying to drive at 75mph--would idle fine, but any acceleration made her tumble out of sight---now I will tell you it's been two years since I changed a filter--too long yes, but when I did this system I said I was going to run it and not change a thing until something happened--so now I know---lucky for me I put in a fuel shut off valve and we pulled out the element and was back in business in 15 minutes or so--this happened this last weekend right after we left Pocatello from the BullyDog event on the way back home----the Aeromotive pump has been making funny noises for about 2 weeks, but I figured she was going to give up the ghost, but nope she's purring great now and loving life---I will now change filters every year---chris