Hey Thomas did you forget this thing runs on gas?
What you read is probably refering to the 2000 model which Honda claimed would get up to 70 mpg. With a ten gallon gas tank that will get you close to the 690 range in theory.
But I have a 2000 model and I get 52.4 mpg. So I doubt I will ever see 690 miles on a tank of gas.
The batteries that charge when you coast, brake, etc.. are for the 15 horsepower electrical assist. It is kinda like an electrical turbo.
The 3 cylinder gas motor is the true engine of the car.
