Do Fuel Quality/Types/Additives Help Mileage?

Petrol pump attendants often try to convince you to go for 'Speed petrol' or 'X-tra Mile diesel'. But this need not necessarily help improve your vehicle's fuel efficiency. Always use the grade recommended for the vehicle by the manufacturer. Higher octane fuel may not only be a waste of money but may harm the vehicle, as well. However sticking to one brand of fuel is always good for the engine. Know more about Octane Ratings

Keep the Windows Closed

Driving with your windows open considerably reduces mileage, far more than keeping the AC on while driving along highways. So preferably keep the windows closed and the AC on if you want to keep cool. Of course the air-conditioning decreases fuel efficiency considerably, so use it judiciously. Windows down or A/C on — which is more fuel-efficient?

Refill in the morning/late evening

During these times petrol is densest. Keep in mind - fuel pumps measure volumes of petrol, not densities of fuel concentration. You are charged according to "volume of measurement". [via HowToAdvice.com]

Check Tyre Pressure

Keeping the tyres well inflated is one of the simplest things you can do to help improve your car's fuel efficiency. You can improve the mileage by about 3.3 percent if you keep your tyres inflated properly, according to the DOE.

Lighten Your Load

Empty out your boot of unnecessary items. For every extra 45 kg you carry, your fuel efficiency can drop by 1-2% in a typical vehicle.

S-L-O-W D-O-W-N

The faster you drive, the more fuel you use. Driving within the speed limit recommended by the manufacturer helps save fuel. Driving just 5mph over the speed limit can affect fuel economy by up to 23%. Likewise, quick acceleration consumes too much fuel; accelerate slowly and gradually.

Tune Your Engine

A well-tuned engine can improve fuel economy by up to 4%. So change your oil and follow your car manufacturer's recommendation on servicing.

Clean the Air Filters Regularly

Air filters keep impurities from damaging your engine. Replacing a clogged air filter can improve fuel economy by as much as 10%.

Don't Be a Clutch-Driver

Never keep your foot on the clutch while driving. When you do this, pressure is being placed on your clutch, and it not only reduces mileage, but also wears out the clutch plate, replacing which is not cheap.

Keep the Car in Showroom Condition

It's always prudent to keep the car in the showroom condition. Remember that any modification to the car, such as broad tyres, diffusers etc., will adversely affect the mileage.

Got another tip?

I'm sure there are more tips that you have tried and found to be productive. Please share them with others, too. (in the comment section below)