Does anyone know where to find gas mileage charts on different brands and types of motorcycles and scooters?

Does anyone know the best value on scooters or motorcycles. Not looking for fancy....just cost efficient and dependable. :)

What are your speed requirements . . what engine displacement (cc's) are you considering?

A 49cc 4-stroke may get 90-100 miles per gallon, but top speed is only around 30mph . . there are a lot of variables.