10 Sporty Cars With Great Fuel Economy Published on May 26, 2023 in Top 10 by The Car Guide Photo: Toyota 2023 Toyota GR Supra 2.0 Surprised? Well, it’s true: the GR Supra is a fuel-efficient sports car, especially in 2.0 trim (255 hp). It needs just 8.6 L/100 km of premium gas. By the way, the 382-hp GR Supra 3.0 is rated at 9.1 L/100 km.