Gasoline is still way ahead. It still has ~40x the density of batteries. Even at 16%, it's still going to be about 6x as efficient as batteries, even if batteri

Gasoline is still way ahead. It still has ~40x the density of batteries. Even at 16%, it's still going to be about 6x as efficient as batteries, even if batteries + electric motors are at 100% efficiency. A Toyota Camry car carries 17 gallons of fuel, which, at 6 lbs per gallon, is about 100 lbs. At 28 mpg, that's enough to travel 476 miles. The Tesla S carries a 900 lb battery which is enough to travel about 250 miles. In miles per lb, that's 4.7 for the Toyota, and 0.28 for the Tesla. Obviously, there are a lot of other considerations than just miles per lb, but gasoline's energy density and portability are stellar.