An article from Confused.com:
<h2>Dangers of running on empty</h2>
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 β 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.[/list]
<h2>How far can you drive with the warning light on?</h2>
"There's no statutory amount that should be left in the tank before
the warning light comes on," says Matthew Minter from motor manual
While 50 miles seems to be what most drivers believe the average
range is, in reality it varies significantly across different makes and
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 β 38 miles
Vauxhall Corsa β 32 miles
Ford Focus β 41 miles
Volkswagen Golf β 42 miles
Nissan Qashqai β 43 miles
Volkswagen Polo β 41 miles
Vauxhall Astra β 33 miles
Audi A3 β 40 miles
Mini β 45 miles
BMW 3 Series β 44 miles