I'm a new scooter rider, only one and a half weeks. Just filled up the tank today. I have 204 miles on the scooter and it took 2.7 USA gallons of gas. That calculates to around 75 mpg. I ride 5 days per week to tennis, 30 miles round trip. The road is perfect for this type of transportation, half at 45 mph and the other 35 mph. Only four stops along the way. Does everyone use the gas additive?