does diesel give better mileage than gas
Diesel may cost more than regular gasoline (about $0.24 more per gallon, per AAAâs current figures) but itâs much richer in energy â between 25% and 30% richer. The new BMW 328d (d for diesel) gets better mileage than the gas-powered Smart fortwo coupe. And it produces 180 horsepower, compared to the Smartâs measly 70.