Hybrids have become the kings of fuel economy, but old-fashioned gas engines have also come a long way in conserving gas. Ford‘s new Fiesta model, for example, promises to get at least 40 miles per gallon on the highway. Those worried about both saving and going green may want to look at used Toyota and used Ford models before paying new car prices.

The Fiesta’s 40 miles per gallon is impressive for a gas-powered engine, and puts it in the ballpark of hybrids like the Honda Insight at 43 mpg and the Toyota Prius at 48 mpg. According to the Wall Street Journal, Ford designed the car in the same manner of the economy cars of the past.

The model attains its impressive fuel economy from its lightweight frame and small four-cylinder engine. The design is reminiscent of classic, fuel-efficient vehicles like the Volkswagen Rabbit, Honda CRX, and Suzuki Sprint, some of which got over 50 miles per gallon decades before hybrids hit the market.

However, safety features have caused cars to gain in weight. Most cars today weight over 3,000 pounds, but the Fiesta’s small size of 2,600 allows it to achieve some of the best fuel economy available with a gasoline engine.