Fuel Consumption – Separating the Fact from the Fiction
The following separates the fact from the fiction by dispelling some of the commonly-held myths about fuel consumption.
Speed – The more slowly you drive, the less fuel you will use, so sticking to the speed limit will not only keep you out of trouble with the law, but also save you money at the pumps. According to statistics released by the Department for Transport, driving at 70mph will cause you to use up to 9% more fuel than at 60mph and 15% more than at 50mph.
Tyres – Figures released by the RAC show that keeping tyres inflated to the correct level can improve fuel consumption by as much as 2%. It really does pay to keep an eye on the pressure gauge.
Roof racks – Contrary to the popular belief that roof racks can reduce fuel efficiency, research by Auto Express demonstrated that most modern racks do little to affect fuel consumption.
Air con vs. windows - As summer approaches, the old debate over air conditioning versus the open window rears its head again. The advice from the experts? At low speeds, wind the window down, but at higher speeds, switch on the AC.
Stereo – Another myth, listening to the radio or a CD has little impact on your fuel efficiency.
Coasting – Engaging the clutch to reduce revs while going downhill is a commonly-used tactic for thrifty motorists. However, according to the AA this is not only dangerous, but thanks to modern fuel systems won't do much to improve your petrol consumption.
Petrol or Diesel – In general, diesel cars are more fuel efficient than their petrol equivalent, but this isn't always the case. Never assume that a diesel will be more cost-effective, particular when you factor the more expensive cost of purchase into the equation.
Running on vegetable oil – Many older vehicles can easily be modified to run on vegetable oil and at around 55p a litre, this is a highly cost-effective solution. The downside? Be prepared for a car that smells like a chip shop and although you no longer have to pay tax if you use less than 2,500 litres a year, you'll need to keep receipts to prove this.
