10 Sporty Cars With Great Fuel Economy Published on May 26, 2023 in Top 10 by The Car Guide Photo: BMW AG 2023 BMW Z4 sDrive30i Developed alongside the new Toyota GR Supra, the Z4 is rated at a combined 8.4 L/100 km when equipped with the base 2.0-litre engine (255 hp). Naturally, premium gas is required.