It may sound obvious, but how often do you clear out the unnecessary baggage and clutter in your car? If your car boot is carrying a little excess weight, give it a helping hand by lightening the load and ditching the extra luggage. Likewise, a roof rack or bicycle rack is going to slow you down.
Choose your air flow
If possible, leave the air conditioning switched off as this, along with other electrical appliances, can put a strain on the engine and use up more fuel, particularly at lower speeds. However, if it's getting a bit warm, you can significantly reduce drag by winding up the windows, closing the sun roof and switching to air conditioning.
Ease off the pedal
By obeying the speed limits you're actually improving your car's mpg. Studies have shown that reducing speed by just 10mph can use up to 25% less fuel. Driving for fuel efficiency means accelerating smoothly and keeping engine revving to a minimum.
Regular stopping and starting uses up more fuel so it pays to look ahead and be aware of any obstacles that might be coming up. By reading the road in advance you can ease off the throttle and keep a steady pace. This is another good reason to maintain a healthy distance between you and the car in front as you're less likely to need to constantly brake and accelerate again. Likewise, if you spot a hill coming up, use gravity to your advantage and pick up speed as you go downhill to help you get uphill, just as you would on a bike.
Pump it up
Simply keeping your car in good condition can maximise your miles per gallon. Tune up your engine and regularly check the air filter, oil and spark plugs. Perhaps most importantly, make sure your tyres are pumped up as properly inflated tyres can improve fuel efficiency by as much as 3% and will avoid uneven wear on the tread.
Don't be idle
If you're waiting for someone or just sitting in traffic for a while, switch off the engine, assuming it's safe to do so. Unless the weather is very cold, the best way to warm up an engine is to drive slowly until it reaches optimum temperature. Similarly, it's easy to waste fuel driving around or idling in car parks so aim for open spaces further away rather than waiting around for a spot that's closer.