Israel’s Aquarius Engines has redesigned the internal combustion engine.  Its horizontal-moving cylinder powers two electric generators with much less waste energy than current 4,6 or 8 piston engines.  With the smaller engine, cars can reach 1300 miles on a single tank of gas.

http://www.timesofisrael.com/israeli-car-engine-could-cut-halve-fuel-costs-emissions/