I refuse to engage in the trend for “hypermiling”. I found a way that beats all of my attempts to squeeze even more mileage out of my BMW: Don’t drive the car. For $1200 I got a used moped, and I expect it to pay for itself within 4 months.
On this moped, I have travelled about 160 km (100 mi) and have used up 3.34L of gasoline (0.8826 gallons). My mileage is thus around 113.3 miles per gallon. In metric, that is 2.09 liters per 100 km. In human terms, that means I can go about 213 kilometers on a tank of gas. The 4.47 L tank costs about $6 to fill with the cheap gas, and about $6.60 to fill with the high-grade fuel. Since the cost is trivial, I always use high-grade fuel. Compare this with my BMW: It costs $95 to fill it with cheap gas, and its mileage hovers around 17 miles per gallon.
The specs on a website I visited for this bike says that with the reserve tank, it can hold 1.18 gallons of gas (about 4.47 L).
It is a Tomos LX moped, from 2006. And, while my bike does not say “Targa” on it, I have seen identical bikes from American websites and they say “Targa” over the gas tank, while mine says “Tomos”. I am given the impression that the 49 cc engine is standard on all mopeds. My moped had been fitted with an upgraded muffler, but it does not have any adjustments made to the governor. So, my top speed on this bike with me riding on it (I weigh 220 pounds) on level ground would be about 60 km/h (about 38 mi/h).