If you would like to drive more environmentally friendly, but there is no chance for you to switch to a hybrid, there is probably a way to make your used car burn less fuel and therefore reduce emission.

Have you ever heard about “remapping”? Although many people will associate the term with the modified car scene, it is actually becoming an increasingly common practice amongst mainstream motorists.

What is engine remapping?

Remapping refers to a process that alters a car’s standard ECU settings to gain more horsepower and torque, and, in some cases, to reduce fuel consumption. What’s more, remapping is a cost-effective modification that, when performed by a certified remapping specialist, can take as little as two hours to complete.

Those who own turbocharged cars will benefit from the greatest power gains, with up to 30 percent more horsepower and torque obtainable after a remap, whereas non-turbo engines typically give a 10 percent gain in these areas.

For example, the hugely popular  BMW 320D, which boasts 163hp and 340Nm of torque in standard guise, will have its power rating boosted to around 190hp and 400Nm of torque after a remap. Similarly, a 1.6 TDCi Ford Focus, which only offers 109hp as standard, will gain almost 30hp after a professional remap.

Can remapping my car’s engine improve its fuel efficiency?

In many cases, yes. Although the remapping process won’t directly make your engine cleaner, it can increase its fuel efficiency rating, which will have a positive environmental effect, and benefit your wallet, too.

For example, in both the cars mentioned above, fuel consumption will drop by around 1mpg after remapping. In the case of the Volkswagen Golf GTi 1.8T, meanwhile there is a 2mpg improvement after remapping, which will add up to considerable savings over time, particularly for those doing high annual mileages. What’s more, you can achieve even greater fuel efficiency gains at the expense of power, if this is your priority.