Find your cheapest station. The difference between the most expensive and the cheapest price per liter can be as much as 5% or more. Some stations change their prices during the day to try to attract new customers at less popular times (some outlets drop their prices after 9 or 10 pm). Check it out! Some stations have a special one day a week (their slowest day). In many cities, radio stations let you know each day where the cheap prices are. You can find websites that claim to find the lowest prices in your area, but often these aren't updated frequently enough.
Pump up your tires. Under-inflated tires create more rolling resistance and so use more fuel. Go to your local gas station and use their pump - it is normally free. Usually, you can find the recommended tire pressures on a plate on you car door. Stay inside this recommendation.
Lose weight. Every extra 50kg (110 lbs) will increase your petrol consumption by an average of 2 percent, according to some British sources. So keep all your golf clubs - or anything else littering your boot - at home. Take out the winter kit when Spring comes. Get rid of the mega tool kit (when was the last time you needed it?) How much winter mud is married to your underbody...get down there and check.
Streamline. Roof racks and bicycle carriers create extra wind resistance and so increase fuel consumption. If you do not need it, take it off. Turn off the air conditioning. It increases your petrol consumption by as much as 10 percent - so if it is only mildly warm, put the fans on or wind down your window. That said, if you are traveling over 60mph having the window down increases drag which increases your fuel consumption - so air conditioning would be better.
Stick to the limits. The faster you go, the more fuel you use. Driving at 70mph uses up to 9 percent more fuel than at 60mph and up to 15 percent more than at 50mph, according to transport authorities. ...
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Author: Mary Norton