Supercars are usually very thirsty for premium fuel. However, with the right combination of transmission and differential ratios, it is possible to cruise efficiently. Officially rated at 22 mpg on the highway, here is a 2020 McLaren GT MPG test by Supercars in Seconds. Our friend Matthew Jones is the General Manager of McLaren Tampa Bay, and he knows every detail of each model. The McLaren GT was a departure from all-out performance in order to offer the ultimate Grand Tourer. With ample room for a weekend getaway, it has storage behind the seats and under the hood. The 4.0-liter is rated at 612 horsepower and 465 lb-ft of torque, so how does it perform when the turbos are at idle. Tell us your thoughts in the comments below and click the button to browse their inventory.