5 Best Fuel Efficient Cars Under $30K

2. Hyundai Elantra

Miles Per Gallon: 36 mpg

Starting MSRP: $21,475

Hyundai Elantra comes in three trims, SE, SEL, and Limited. The base trim, SE, has a combined fuel economy of 36 mpg, making it the second-best cheap fuel-efficient car on our list. Hyundai Elantra comes with a 2.0L 4-cylinder engine that produces around 147 horsepower.