Gas light on: How many kilometres do you have left?
Your car is starting to run on its fuel reserve. How many kilometres can you drive before running out of gas? Find out what you need to know to protect your car and avoid unpleasant surprises.
How many litres are left in the tank when the gas light comes on?
On average, about 8 to 10 litres of fuel remain when the warning light appears on your dashboard. The exact amount of fuel varies depending on the model, engine type, and tank size. This reserve is designed to help you reach a gas station in case of urgent need.
In practice, you could drive between 89 and 132km before the engine stops. A 50km trip is therefore possible in most cases, except under extreme conditions.
Is running on empty bad for your car?
Yes. Frequently running on empty can damage the fuel pump, which needs fuel to stay lubricated and cooled. In addition, when the tank is nearly empty, debris that has settled at the bottom can be drawn in and cause:
- Premature engine wear
- Clogged fuel lines
- Damage to the catalytic converter due to a lean air-fuel mixture
“Running your vehicle on empty can lead to premature wear and costly breakdowns. I recommend keeping your fuel level at least a quarter full to protect your fuel system.”
Sylvain LégaréResearch Analyst, Mobility, CAA-Quebec
Why is running on empty riskier with a diesel engine than a gas engine?
Running on empty is riskier with a diesel engine, as the fuel and its associated systems are more sensitive. Diesel fuel, which is heavier and oilier than gasoline, can cause several problems when the tank is nearly empty:
- Clogged injectors
- Issues with the emissions control system (diesel particulate filter, AdBlue additive)
- Risk of condensation and engine corrosion, especially in winter
Why does my trip computer show zero km remaining, but I can still drive?
When your trip computer displays “0km remaining,” it’s providing an approximate estimate of your remaining range. There is always a little fuel left, but you should not rely on this margin to travel long distances.
What factors affect your range when running on empty?
Several factors influence fuel consumption:
- Driving style: Aggressive driving increases fuel consumption.
- Type of trip: You use more fuel in the city than on the highway.
- Weather conditions: Snow, ice, and wet roads can increase your fuel consumption by nearly 30%. In cold weather, fuel can also freeze if the tank is not sufficiently full.
How do you avoid running out of gas?
Always keep your gas tank at least a quarter full to avoid breaking down. This will extend the life of your engine components and help you avoid a tow, costly repairs, or worse, putting your life or others’ lives at risk.
Tip: In very cold winter weather, keep your fuel tank at least half full to reduce the risk of condensation and freezing.
How do you maximize your vehicle’s range when the gas light comes on?
- Reduce heating and air conditioning
- Turn off energy-draining accessories (heated seats, defrosters)
- Avoid sudden acceleration
- Activate your vehicle’s “eco” mode if available
Discover our other tips to save on gas.
Key takeaways
Running on empty carries risks, especially for diesel vehicles. To protect your engine, reduce repair costs, and avoid running out of gas, always keep your tank at least a quarter full. Plan your gas station stops ahead of time. By adopting these best practices, you can optimize your fuel consumption and extend the life of your vehicle.
Benefit from personalized advice
Do you have questions about gas-powered or electric vehicles, driving, or need recommendations to find an Approved Auto Repair Service?