Q. What is the ideal speed to drive in highways to get best mileage on C 220d progressive. Also should I go for diesel or petrol with just Rs 5 difference in per litre price - C-Class?

A start-stop system turns your engine off when you are stationary and saves you fuel in the process. Here's more on how you can improve fuel economy by using start stop systems

Braking wastes energy, reduces momentum and requires more fuel as you accelerate again. Here's a smart guide to driving efficiently by minimising braking

Unnecessary idling gets you nowhere and burns fuel in the process. Here's ways to avoid that

Weight is the biggest enemy of fuel economy. The basic rule to save fuel is travelling light. But there's more to it than just that. You can start by purchasing a car that weighs the least

Tips on using your air conditioner efficiently and much more can be found in this guide to improve fuel economy