30 Fuel Saving Tips For Saving Over 30 Percent On Fuel Cost Hypermile: Extreme Energy Efficient Driving Hypermiling is the art of saving fuel by understanding and reducing the driving habits or ways that sips extra fuel on every mile (km) you drive. Without knowing the below little secrets we conveniently blame the vehicle or car manufacturer to design such fuel-thirsty cars. Of course, we agree some cars are more fuel-sipping than others that have been engineered with fuel efficiency