Premium unleaded and diesel costs more at the pump but is it worth buying and what's the benefit? Sue Hayward investigates.
Premium performance fuels like Shell’s V-Power Nitro +, BP Ultimate or Texaco Supreme make promises to clean and protect your car and even help squeeze more miles from your tank.
But when it costs more at the pump, is it really worth splashing out on a tank of super fuel?
Premium petrol costs up to 10p a litre more than standard unleaded petrol.
And it’s not just the big names selling it: even supermarkets sell upgraded versions such as Tesco’s Momentum 99 or Sainsbury’s Super Unleaded.
What is premium fuel?
Super fuel or high performance fuel is petrol with a higher octane rating.
Most standard brands of fuel have a 95 octane rating.
But super fuel typically has a higher rating - around 98 - which can make the engine work more efficiently and improve performance.
You can also buy versions of super fuel suitable for diesel vehicles too.
Will I notice any difference at the wheel?
But Matthew Minter, editorial director of motor manual publisher Haynes, says most people won’t drive in a way to notice any difference.
"And 99% of cars will work perfectly well on 95 octane standard unleaded fuel," he adds.
However, says Minter, with certain high-performance sports cars, some experts believe filling them with super fuel can improve performance.
My husband’s always been a super fuel cynic and considered the extra cost a waste of money.
Will super fuel save me money?
But after a work colleague talked up the benefits, he tried it in his Mercedes SLK200 and was surprised with the results.
He saved around £6 per tank due to the extra mileage the super fuel produced.
I, on the other hand, filled up my Peugeot 206 CC for the purpose of researching this blog and didn’t notice any difference.
But it's worth trying out super fuel says Chris Patience from the AA.
"Different cars will respond differently to these fuels so the only way to find out really is to try it and see."
Does it have magic cleaning properties?
Premium petrol producers make claims of additives designed to clean and protect your engine but does this make it worth buying regularly?
"Premium fuels do contain more effective detergent additives which help the removal, and prevent formation of, carbon and gum deposits on valves and other components inside the combustion chamber," says Patience.
But there’s no need to regularly fill up with more expensive fuel if you want to look after the insides of your motor - just the occasional tank can do the trick.
Patience adds: "If you’re planning to keep the car long term, using a premium fuel every fourth tank can help engine longevity and maintain performance over time."
Should you start off with super fuel?
If you’re buying a new car, the Society of Motor Manufacturers and Traders (SMMT) says some manufacturers will recommend a particular type of fuel.
For example, Ford suggests using BP Ultimate in its vehicles.
Vauxhall on the other hand doesn’t recommend a particular fuel.
Vauxhall spokesman Simon Hucknall says you’d be "wasting your money" by putting high octane performance fuel into most of its standard range of cars, with just a couple of exceptions on its top-of-the-range models.
Should I fill my secondhand motor with premium fuel?
If you buy a secondhand car that’s been run for years on whatever the nearest pump had to offer, regularly flushing it through with a few tankfuls of premium fuel can still improve performance, according to the AA.
"However you’re the only one who can decide if there's a noticeable change in performance or measurable improvement in fuel economy that's worth the premium paid for the fuel," says Minter of Haynes.
What do you think?
Is it worth paying more for 'super' petrol?
We want to hear from you! You can share your views on the message board below.
Compare car insurance - you could find a great deal in minutes Get a car insurance quote