Both my DT300I scoots would/will go 200 miles with plenty of reserve. The gauge is more accurate near the bottom than the top like kneeslider said. I carried a small gas can on the first DT to find out just what kind of reserve I had after 200 miles. I chickened out at 230 miles with no bars left on the gauge, the gas pump symbol on the gauge flashing, no orange or yellow gas pump symbols showing on the panel and put 3.2 gallons ( I think!) in the tank! I was happy as a calm to know there was a 30 mile reserve!