Well she's at 5000 miles and I had my oil changed at the dealer's today and I changed my fuel filter myself when I got home. Man, I noticed a difference in throttle response when I took her out for a test drive. I suggest to change the thing for those guys preparing for a race day. It's easy. Shouldn't take 10 minutes and cost $10 dollars. You'll feel it. I plan to change the fuel filter every 5000.