Running out of fuel is not, in itself, a specific criminal offence in the UK. However, if you run dry on a motorway and have to stop, you can still be fined and given penalty points, because the law treats running out of fuel as an avoidable breakdown rather than a genuine emergency. In practice, police can issue a penalty for stopping on a motorway or for careless driving if your empty tank was the result of negligence.
So the honest answer is: not illegal as such, but it can cost you a fine, points, and a great deal of danger. Here is what the law actually says, whether you really could be penalised, and exactly what to do if it happens to you.
What the law actually says
The Highway Code is clear that you are responsible for making sure your vehicle is fit for the journey, and that includes having enough fuel. Rule 97 says you should ensure you have sufficient fuel before you set out, particularly before a long motorway journey where filling stations can be far apart.
Motorways also have strict rules about stopping. You must not stop on the carriageway or the hard shoulder except in a genuine emergency or when told to by the police, traffic officers, or signs. Because running out of fuel is considered preventable, it does not automatically count as a genuine emergency in the way a sudden mechanical failure might. That distinction is what exposes you to a penalty.
Could you really get points for running out of fuel?
Yes, it is possible. If the police attend and judge that you stopped on the motorway because you negligently let the tank run dry, they can issue a Fixed Penalty Notice, typically three penalty points and a fine, for stopping on a motorway or for driving without reasonable consideration.
In more serious cases, particularly if running out of fuel in a live lane contributes to a dangerous situation or a collision, it can be treated as careless or inconsiderate driving, which carries between three and nine points and a larger fine. Most drivers who run out of fuel are not prosecuted, but the possibility is real, and it is entirely at the officer's discretion based on the circumstances.
The bigger risk is the danger, not the fine
Whatever the legal position, the practical danger of running out of fuel on a motorway is far more serious than a penalty. A vehicle losing power in fast-moving traffic, especially in a live lane on a smart motorway with no hard shoulder, is one of the most hazardous situations on the road.
If the engine cuts out as you slow, you also lose power steering and the brakes become much heavier, which makes it harder to control the car into a safe position. This is exactly why the law expects you to plan your fuel, and why running dry is taken seriously even though it is not a named offence.
What to do if you run out of fuel on the motorway
If you realise you are about to run out, act immediately rather than hoping to coast to the next services:
- As soon as you feel the engine losing power, move to the left as far as you safely can, aiming for the next exit, a service area, or an emergency area.
- Put your hazard lights on so other drivers can see you are slowing.
- If you reach a hard shoulder or emergency area, stop, get out by the left-hand doors if it is safe, and wait behind the safety barrier, not in the car.
- Do not, under any circumstances, walk along the carriageway to a petrol station. Pedestrians are banned from motorways, and walking on one is extremely dangerous.
- Call for emergency fuel delivery. Fresh petrol or diesel is brought straight to you, enough to reach the nearest filling station, without you having to leave the safety of the verge.
Does running out of fuel damage your car?
It can, which is another reason to avoid it. On petrol cars, the fuel pump sits inside the tank and relies on the fuel around it to keep cool. Running completely dry makes the pump work without that cooling, and although a single incident rarely causes lasting harm, repeatedly running the tank empty can shorten the pump's life.
Diesels are more troublesome. Many modern common-rail diesels draw air into the high-pressure fuel system when the tank runs dry, and simply adding fuel is often not enough to restart the engine, the system has to be bled and primed first. A proper fuel delivery service for a diesel includes that priming, so the engine actually restarts rather than just cranking.
How to make sure it never happens
The simplest habit is to refuel whenever you drop below a quarter of a tank, rather than running it down to the warning light. On a long motorway run, plan your fuel stops around the service areas on your route, and remember that heavy traffic, cold weather, and a full load all increase consumption beyond what you might expect.
If you do get caught out, do not take a risk to save a few pounds, get yourself to a safe place and let us bring the fuel to you. It is far cheaper and safer than the alternatives.