American AI is usually American Airlines, and usually appears because of a baggage fee paid at the airport, or a purchase made during a flight. posted 09/11/2012 Helpful (4)
Electric motors are in general, a lot more efficient that internal combustion engines. An average combustion engine has about 18â20%. A formula one engine, has about 50% of an efficiency.
For example, a car that uses less gas consumes fewer natural resources, and is thus kinder to the environment. The 11 models listed below (our list is slightly longer than usual due to ties) are the most fuel-efficient sedans for 2015.