Factors that impact fuel efficiency



Let’s take a minute or two to talk about fuel efficiency.

The ratings you see – on the windows of new vehicles, and on the web, reflect the results of specific tests done by manufacturers in laboratories, on dynamometers which simulate different conditions.

While the ratings are achievable if you drive with fuel efficiency in mind, it’s important to remember that five factors can have a dramatic effect on your fuel consumption: 

  • Driving behaviour: Rapid acceleration, speeding, driving at inconsistent speeds and even extended idling can increase your fuel consumption. The smoother you drive, the better your results will be. Drive smarter – and reduce your fuel consumption by up to 25%!
  • Weather: The colder it is, the worse your fuel consumption will be. Poorer driving conditions, more friction, different types of fuel – it all adds up. A drop in temperature from 24 to 7 degrees can increase fuel consumption in urban commutes from 12 to 28%.  In the summer, air conditioning robs engine power, and open windows at highway speeds can make your car much less aerodynamic, and that increases fuel consumption too.
  • Weight: It’s a fact that lighter cars use less fuel. For every 25 kilograms of weight you add to a mid-sized car, you’ll worsen your fuel economy by one percentage point. So… lighten up!
  • Aerodynamics: Today’s vehicles are designed to slip easily through the air. Bike or ski racks or cargo boxes can increase your fuel consumption by 20% so don’t keep them on the vehicle unless you’re actually using them.
  • Route planning and congestion: It just makes sense to think about where you’re going… BEFORE you leave. Check conditions and traffic or construction reports, and you’ll save time AND fuel.

Here’s the bottom line: while choosing an efficient vehicle is very important, how, where, and when you drive has a big effect on your fuel consumption, and how much you contribute to harmful greenhouse gas emissions.

Think about it.