For trip budgeting, El Monte’s current highway guides are about 14−18 mpg (13−17 L/100 km) for Class B, 10−12 mpg (20−24 L/100 km) for Class C and 8−10 mpg (24−29 L/100 km) for Class A. Petrol is the normal fuel in mainstream rental fleets; diesel models are much less common. Confirm the selected category because load, speed, wind, terrain and urban traffic can all change the result.