Top 10 Cheapest Non-Hybrid Cars That Get 40 MPG Highway

3. Chevy Sonic LT Sedan $17,050

If you opt for the slightly less practical Chevrolet Sonic sedan, you’ll save a whole $700, some cash that doesn’t necessarily have to be at the gas pumps thanks to the subcompact’s 40 mpg highway rating. The pricetag comes with the mid-level LT package, using a 1.4L turbocharged engine and a manual transmission. Check out the full specs of the Chevrolet Sonic at our new car buying page.