With the cost of living on the rise and fuel prices fluctuating across Canada, many drivers are looking for ways to save money at the pump. 

There are a lot of myths floating around about fuel efficiency, some passed down through generations, others picked up online or at the gas station. 

While a few contain a grain of truth, many of these habits do not significantly save you money and could potentially have negative effects on your vehicle in the long run. 

Here’s a breakdown of the most common fuel efficiency myths Canadian drivers still believe – and the proven strategies that actually work. 

Myth 1: Letting Your Car Idle Warms It Up Faster

For decades, Canadian drivers have believed that idling their car for several minutes in the winter is the best way to warm it up. 

The truth? 

Modern engines don’t need long idle times, even in extreme cold. 

Reality: Driving gently for the first few minutes is the most effective way to warm both your engine and cabin. Idling can lead to higher fuel consumption and may contribute to engine wear over time. 

What works: Limit idling to 30-60 seconds, then drive smoothly to warm up the vehicle naturally. Use a block heater when temperatures drop below -15°C to make cold starts easier and more efficient. 

Myth 2: Premium Gas Gives Better Mileage in Any Vehicle

At the pump, it’s easy to think higher octane fuel means better performance and efficiency. 

While premium gas has its place, it’s not a universal solution. 

Reality: Unless your vehicle’s manufacturer specifically requires premium fuel, filling up with it generally does not improve mileage or engine performance. 

What works: Follow your owner’s manual. Using the recommended fuel grade is the best choice for both efficiency and engine health. 

Myth 3: Small Cars Always Use Less Gas Than Larger Vehicles

It makes sense to assume that a smaller car will always beat a bigger one on fuel economy, but that’s not always true anymore. 

Reality: Advances in engineering mean some SUVs or crossovers with efficient engines, hybrids, or diesel systems can rival or even surpass compact cars in fuel efficiency. Driving habits also play a huge role. 

What works: Don’t judge efficiency by size alone. Compare the Natural Resources Canada (NRCan) fuel economy ratings before buying and consider your actual driving conditions. 

Myth 4: Filling Up in the Morning Saves Money

Some drivers swear by the idea that pumping fuel in the cool morning gives you more gas for your dollar because the liquid is denser. 

Reality: While fuel density does change slightly with temperature, Canadian gas stations store fuel underground where temperatures remain stable.  

What works: Focus instead on keeping your tires inflated and sticking to steady driving habits. That will save far more than worrying about the time of day you fill up. 

Myth 5: Cruise Control Always Saves Fuel

Cruise control is often touted as a fuel saver – but it’s not foolproof. 

Reality: On flat highways, cruise control can indeed save fuel by maintaining steady speeds. However, on hilly or icy terrain, it can cause your car to accelerate aggressively, burning more fuel and reducing control. 

What works: Use cruise control on long, flat stretches of highway, but avoid it in the city, on hills, or during slippery winter driving. 

Myth 6: Rolling Down Windows Is Better Than Using Air Conditioning

This debate has divided drivers for years – should you crack the windows or blast the A/C? 

Reality: At low speeds, open windows are more efficient than air conditioning. But at highway speeds, the drag created by open windows outweighs the fuel cost of running the A/C. 

What works: Use A/C sparingly, especially at city speeds. On the highway, keeping windows up with moderate A/C use is usually the better choice. 

Proven Ways to Improve Fuel Efficiency

Now that we’ve busted the myths, here are evidence-based tips that really work for Canadian drivers: 

Drive Smoothly

Rapid acceleration and hard braking can increase fuel consumption. Anticipate traffic flow and maintain steady speeds whenever possible. 

Lighten the Load

Extra weight means extra fuel consumption. Remove roof racks, cargo boxes, and heavy gear when not in use. 

Maintain Tire Pressure

Under-inflated tires can increase fuel consumption by up to 4 percent. Check tire pressure monthly, especially in cold weather. 

Keep Up With Maintenance

Regular oil changes, clean air filters, and timely servicing keep your engine running efficiently. 

Plan Trips Wisely

Combining errands reduces the number of cold starts and improves fuel efficiency once the engine is warm.  

Consider Eco-Driving Techniques

Using apps or in-car displays that track fuel economy can help you adjust driving habits and see real-time savings. 

Keeping It Real

Saving money on fuel isn’t about shortcuts or old wives’ tales. 

It’s about consistent driving habits, proper vehicle maintenance, and smart choices on the road. 

By letting go of myths and focusing on proven strategies, Canadian drivers can stretch every litre further, without compromising safety or performance. 

Fuel costs may be unpredictable, but your approach to efficiency doesn’t have to be. 

The real savings come from knowledge, preparation, and mindful driving every time you hit the road.