Fast acceleration and braking wastes fuel, by as much as 33 percent on motorways and by 5 percent in urban environments.
Observe the Speed Limit
While each vehicle reaches its optimum fuel economy at a different speeds fuel efficiency decrees rapidly at speeds above 60 mph.
Keep your vehicle regularly services.
A well tuned engine is will improve your fuel economy by 4% and you will have less repair bills. You can improve your gas mileage by around 3.3 percent by keeping your tires inflated to the proper pressure.
Properly inflated tires are safer and last longer.
Change your air filter & oil.
A clean air filter can improve fuel economy by as much as 10% and the right oil will also save you 1 to 2%.
Remove Excess Weight.
If you do not need it in the car make sure you remove it, this includes empty roof racks and all that junk you keep in the boot and save 2% mpg.
Save around 3.3 percent by keeping your tires inflated to the proper pressure.
Properly inflated tires are much safer and last longer and this will be less strain on your steering and your engine.
Avoid Excessive Idling
If there is an obvious delay, switch your engine off. For safety make sure your hand brake is on and you are in neutral. The new BMW does this automatically and is very fuel efficient. Nice and relaxed now, great turn down that air conditioner or better still switch it off and open your window and save yourself 10% when below 45 mph after that the drag factor makes it more efficient to use your air conditioner.
Use Cruise Control
Using cruise control on the motorway helps you maintain a constant speed and, in most cases, will save fuel as your will be driving more sensibly. Cruise control is less common in the UK but fantastic for long journeys as it is probably more comfortable on your feet and ankles.
Block changing of gears
Learner drivers are now taught to skip gears, this is easiest done by breaking gently and changing down from 4th to 2nd gear once you are at the correct speed. You are really trying to judge it so you brake in a high gear and only change when the vehicle is around 10 miles per hour.
You can also block change on the way up the gears. The higher the gear the better as you will see your revs per minute drop each time you change up assuming your not revving the life out of your vehicle.
Think of your rev counter as your piggy bank, try and keep your revs under 3000 rpm.
Do you really need to brake?
150 meters to the junction, take your foot of the accelerator and let your vehicle reduce speed, with practice you will need very little braking as your timing improvements. An added benefit is you will not have to replace your brakes as often.
Going down hill!
Lift your foot of the accelerator, it will take about five seconds before you notice any noticeable drop in speed however you will notice it in your pocket.
Dump your gas guzzler
Trade your guzzler in for a smaller engine with better CO2 emissions, it will be more fuel efficient, cost less to tax and insure and if it's a company vehicle save your money on your tax deductions. LPG is half the price of petrol and even more than this against diesel. Opt for a manual gearbox for maximum savings.
Buy a Sat Nav
The most direct route is usually the cheapest route; however use your common sense as they are not perfect.
Do you really need a vehicle?
By the time you pay for fuel, road tax, the vehicle, insurance and repairs and parking you might be cheaper taking a taxi, car pool, public transport or shock the world and ride a bike or start a new crazy and walk. I know this is rather impractical for some journeys but give it a try for those short journeys.