I just did a NASA 3 hour enduro race at Road America. I ended up 4th in class and 10th overall out of 22 cars in all classes. The 944 sp1 competed at an E2 car and thats odd with that class is that tires are open. So, I could have driven on slicks and still be legal. The car used about 30 gallons of fuel during the event and performed pretty much flawlessly. I ended up running 'slow' 3:06 average times with a fastest of 3:03. The winning car in my class had a 2:58 with about a 3:00 ish average so I was happy with what happened.