How to Use GasBuddy and Smarter Driving to Cut Your Fuel Costs

For most Canadians who drive, fuel is a need: you can't get to work, school or the grocery store without it. That makes it part of your 50% bucket, and this year it's been one of the fastest-rising costs in the household budget. Here's how to use a free app to stop overpaying at the pump, when shopping around is worth it and when it isn't, and the driving habits that save more than any app.

Why Fuel Deserves a Closer Look

Statistics Canada reported gasoline prices up 22.8% year over year in August 2026, at a time when overall inflation was 3%. If you drive a typical amount, that's a noticeable jump in a cost you can't simply skip.

Fuel is also unusual among needs: the price changes daily, it varies from station to station on the same street, and how you drive changes how much you use. That gives you more control than you have over rent or insurance. The savings per fill-up are modest, but they repeat every week for as long as you drive.

Using GasBuddy, Step by Step

GasBuddy is a free app and website that shows current fuel prices at stations near you, across Canada and the United States. Prices come from drivers who report them, along with station operators and data partners. Here's how to get the most out of it.

1. Set it up for how you actually drive

Download the free app, allow location access while you're using it, and set your fuel grade. Most cars run on regular. If your owner's manual says premium is "recommended" rather than "required," regular is usually fine and costs noticeably less per litre; check your manual before switching. Make sure the app is set to litres and kilometres.

2. Check before you need fuel, not when the light comes on

The biggest savings come from not being forced to buy. When you're running on empty, you fill up at whatever station is closest. When you have a quarter tank, you can check the app and pick a cheaper station along a route you're already driving. Make a habit of checking prices when you're at a half to a quarter tank.

3. Look at when the price was reported

Because many prices are reported by other drivers, each one shows how long ago it was updated. A price from 20 minutes ago is reliable. A price from yesterday may not be. Give more weight to recent reports, and if you spot a price that's wrong when you arrive, updating it helps the next driver.

4. Use the trip cost calculator before a road trip

For longer drives, GasBuddy's trip cost tool estimates what the fuel will cost and shows prices along the route. That's useful for budgeting a trip, and for avoiding a fill-up in a stretch where prices are much higher, such as a remote highway station.

5. Don't pay for features you don't need

You may see GasBuddy's payment card with per-litre discounts mentioned in reviews and ads. That program is for U.S. drivers and isn't offered in Canada. GasBuddy also sells optional paid memberships. For Canadian drivers, the free price-finding features are what matter, and they cost nothing.

When a Cheaper Station Is Worth the Drive

This is where a lot of fuel-saving advice goes wrong. Driving out of your way to save a few cents a litre can cost more fuel than it saves. Here's the simple math.

Say your vehicle uses about 9.5 litres per 100 km, and fuel costs $1.80 a litre. Every extra kilometre you drive costs about 17 cents. If you're buying 45 litres, every cent per litre you save is worth 45 cents.

On a typical fill-up, each cent per litre you save covers about 2.5 km of extra driving. Beyond that, the detour costs you money.

The best savings come from picking the cheapest station on a route you're already driving. Plug in your own vehicle's fuel use and the current price to get your own numbers, and remember your time is worth something too.

Loyalty Programs and Warehouse Clubs

Most major fuel brands in Canada have a loyalty program: Esso and Mobil stations use PC Optimum, Petro-Canada uses Petro-Points, Shell has Shell Go+, and Chevron uses Journie Rewards. For a regular member, the base earn rate is typically around one cent per litre. Some credit cards and memberships increase that.

• Sign up for the program at the stations you already use. It's free money for something you were going to buy anyway.
• Don't let points decide where you fill up. A station that's 5¢/L cheaper beats one that earns you 1¢/L in points.
• Warehouse club gas is often among the cheapest in an area, but only worth it if you already have the membership and the station is on your way. Long lineups can eat into the value of your time.
• Watch for grocery-and-fuel offers. Some grocery loyalty programs offer cents off per litre for spending a certain amount in-store. They're worthwhile only if you were going to spend that amount anyway.

Driving Habits That Save More Than Any App

Price-shopping saves a few cents a litre. How you drive changes how many litres you buy in the first place. These figures come from Natural Resources Canada:

• Ease off on the highway. At 120 km/h, a vehicle uses about 20% more fuel than at 100 km/h. On a 25 km trip, the faster speed saves only about two minutes.
• Keep a steady speed. Speeding up and slowing down between 75 and 85 km/h every 18 seconds can increase fuel use by 20%. Cruise control helps on flat highways.
• Accelerate gently. Take about five seconds to reach 20 km/h from a stop.
• Don't idle. Turn the engine off if you'll be stopped for more than 60 seconds, except in traffic. A 3-litre engine wastes about 300 mL of fuel every 10 minutes of idling.
• Check your tire pressure monthly. Tires under-inflated by 56 kPa (8 psi) can increase fuel use by up to 4% and wear out more than 10,000 km sooner. Use the pressure on the sticker inside the driver's door, not the number on the tire.
• Take the roof rack off when you're not using it. Racks can increase highway fuel use by up to 20%.
• Clear out the trunk. A mid-size car uses about 1% more fuel for every 25 kg it carries.
• Use air conditioning sparingly. It can increase fuel use by up to 20%.

Use the fuel-saving features your car already has

Many newer vehicles have built-in features designed to save fuel, and plenty of drivers either never turn them on or switch them off. Check your owner's manual to see what your model has.

• Eco or Econ mode. On many models, a button labelled ECO, ECON or similar changes how the vehicle behaves to use less fuel: softer throttle response, earlier gear shifts, and in some cars a gentler air conditioning setting. It makes the car feel a little less lively, and that's the point. It works best in city and steady highway driving. You may want it off when merging onto a busy highway or towing.
• Auto start-stop. Many vehicles automatically shut the engine off when you stop at a red light or in traffic, then restart it the moment you lift your foot off the brake. It's the built-in version of the no-idling advice above, and it adds up in city driving with lots of stops. Some drivers switch it off because the restart feels unfamiliar. If your car has it, leave it on. On most models it turns back on each time you start the car.

If you're shopping for a vehicle, these features, along with a hybrid powertrain if your driving is mostly in town, are worth weighing against the price difference. Natural Resources Canada's fuel consumption ratings let you compare models before you buy.

What It Adds Up To

Here's an illustrative example: a driver covering 18,000 km a year in a vehicle that uses 9.5 litres per 100 km buys about 1,710 litres of fuel. At $1.80 a litre, that's about $3,080 a year, or $256 a month.

That's about $36 a month: worthwhile, but not life-changing for an average driver. Two things stand out. First, the driving habits are worth roughly three times as much as price-shopping. Second, the savings scale with distance. Someone driving 40,000 km a year for work would save about twice as much.

My take

I drive rideshare, so fuel is one of the costs I watch most closely, and the lesson I keep relearning is that the cheapest litre is the one you don't burn. Checking prices before I fill up is a two-minute habit that pays for itself, but driving smoothly, keeping the tires at the right pressure and using the car's own fuel-saving features have made a bigger difference over a year than any station I've driven to for a better price.

From a budgeting point of view, fuel is a good example of why the 50/30/20 rule works with your real habits rather than against them. You don't have to drive less to spend less. You just have to stop paying for fuel you didn't need to use, at prices you didn't need to pay.

Keep reading: How to cut your grocery bill in Canada without eating badly

This article is general information for Canadian readers and reflects the author's professional experience. Fuel prices and savings figures are illustrative examples, not a forecast of your results. Fuel-efficiency figures are from Natural Resources Canada. App features and loyalty programs change; check current terms before relying on them. 503020.ca has no affiliation with, and receives no payment from, GasBuddy or any fuel retailer or program mentioned. This is not personal financial or tax advice.