I'm glad this topic came up. I filled up for the first time, too, this week. I had 3 blobs left on the tank, so figured it was time. I, too, didn't want it to go too low. Anyway, I was very apprehensive this first time: get the cap off just right, don't pump too much gas in it, etc. etc. So, I just held it myself in a kind of slow-on position. Gas was 3.44 here (premium) that day, and I didn't think it'd take $20, but, to my surprise, it clicked off at $19.10...so I pumped it to $19.50...I was afraid to overfill! But at that price, I don't think .40 cents is too much. And, got the cap on securely, and off I went! Oh, and calculated it, and got 36.11 mpg that first tank. Not too shabby.