What is the most economical speed to drive a diesel car?

What is the most economical speed to drive a diesel car?

55-65mphThe Energy Saving Trust says that the most efficient speed you can travel in a car in terms of achieving the best fuel economy is 55-65mph. Any faster, though, and the fuel efficiency decreases rapidly.

Do diesels need to be driven hard?

Driving a diesel engine hard will produce less soot per kWh of useful work. Period. … Driving a diesel hard will also use more fuel. Use the torque which is what a diesel is about and let the DPF sort itself out as necessary, it works for most people like that.

What RPM should I change gear in a diesel?

This means that when you are driving diesel, you can make an easy change at 12–1500rpm for normal driving. When you are driving quickly and want maximum accelleration, it would be given at maybe 4,400rpm and generally max out at around 4,750- 5,000rpm. Diesels give a bigger kick at lower rpm than petrol.