Car running costs Can fuel additives save you money? Oct 2009
- See how we test fuel additives
- Take a look behind the scenes at our secret test lab
- Find out which fuel additives live up to their claims
- Get tips on improving efficiency the cheap way
If you feel like your car could do with a bit more oomph, you might be tempted to try one of the fuel additives you can see on sale at petrol stations and around the country.
Some of them claim to boost performance, cut emissions and even improve your fuel economy – but do they really work, or are they a waste of your hard-earned cash? We’ve been putting them through tough laboratory tests (see our video below) to help you decide.
Please enable JavaScript to access this content.
Petrol and diesel additives
As you’ll see in our fuel additives review, we tested additives designed for use with petrol and diesel. You could pay anything from £4.99 to £20 for a bottle of fuel additive, but because different products need to be used in different concentrations, their true cost can be harder to determine.
What we can tell you is that some additives push up the cost of filling your tank by almost 50%. So are the benefits worth all that extra money? Find out – and see results for individual products like Wynn’s Supremium and Millers Diesel Power Sport 4 – in our full fuel additives report.
You can also get tips on improving performance the cheap way with this guide to greener motoring.



