Running out of fuel is a cause for thousands of road rescues every year.
Many British drivers continue driving for miles after the fuel warning light comes on.
Stranded motorists account for nearly 50,000 of the AA and RAC’s callouts every year, which seems a huge number when it's something that could easily be avoided.
Do you fill up with fuel the minute you hit half a tank? Or do you trundle on until you're running on fumes and risk coming to a spluttering halt?
It’s worth knowing how far you can drive after the low-fuel warning light comes on, and what risk this poses to your car.
Running out of fuel
Most motorists are concerned about traffic jams and getting lost, rather than running out of fuel.
A common belief is that a car can go for roughly 40-50 miles after the light goes on, but that can be quite tricky to track. So, can you trust the fuel gauge on your dash?
The distance you can drive before you run out of fuel will depend on the road conditions and your driving habits. The approximate range on the fuel gauge – if you have it – is usually based on average miles driven.
So it may not be very accurate considering your current driving conditions.
Dangers of running on empty
As the fuel level gets low the car will start picking up debris from the bottom of the tank. This can damage both the fuel filter and pump. The catalytic converter can also be damaged.
Running out of petrol can cause the fuel pump to run dry, which could mean a £200 garage bill.
With diesel cars, the engine management system shuts down before you run out of fuel. This prevents damage to the vehicle. But with petrol cars there's no system like this in place.
Getting stranded is another concern which should be taken seriously. You might be on the motorway with cars whizzing past you at high speed. This creates a dangerous situation, especially if you’ve broken down after a bend in the road.
Here are five fuel-preserving tactics for when you start running low:
Roll up your windows to reduce wind resistance.
Drive at around 40mph – the most fuel-efficient speed (provided this is within the speed limit).
Drive with a very light foot and maintain constant speed.
Turn off all electronic accessories, and unplug any charging phones.
Check your tyre pressure - under-inflated tyres can increase fuel consumption.
How far can you drive with the warning light on?
"There's no statutory amount that should be left in the tank before the warning light comes on," says Matthew Minter from motor manual publisher Haynes.
While 50 miles seems to be what most drivers believe the average range is, in reality it varies significantly across different makes and models.
It’s best to get in the habit of thinking of the low-fuel light as a final warning, rather than driving around with it on.
With that in mind, here are the UK’s top-selling cars, and how far each can go after the fuel light comes on:
Ford Fiesta – 38 miles
Vauxhall Corsa – 32 miles
Ford Focus – 41 miles
Volkswagen Golf – 42 miles
Nissan Qashqai – 43 miles
Volkswagen Polo – 41 miles
Vauxhall Astra – 33 miles
Audi A3 – 40 miles
Mini – 45 miles
BMW 3 Series – 44 miles
Disclaimer: All fuel data is based on real-life information submitted by independent drivers on TankOnEmpty.com.