Published 29th Mar 2023, 10:12 BST - 2 min read.It’s easy to find a super-unleaded petrol near you, although some forecourts may only have a couple of super-unleaded pumps. Some supermarkets also offer super-unleaded, such as Tesco Momentum. The big petrol station chains offer their own versions of super-unleaded, with names such as Shell V Power and BP Ultimate. The government has an E10 compatibility checker that’ll tell you if your car is or isn’t suitable for the fuel. If you’re curious, it could be worth trying a couple of tanks of super-unleaded to see if your car feels different.Īs mentioned above, if you drive a car that isn’t compatible with the new E10 petrol, you’ll need to run on super-unleaded. There’s an argument to say that super-unleaded is the best petrol for your car regardless of what the manufacturer says, as it could clean and prolong your engine. A hot hatch or supercar will still run on standard petrol, but perhaps won’t be quite so smooth or powerful. For some cars, that’s standard petrol, while most high-performance cars run best and produce the most power with super-unleaded fuel. Your car is designed with an optimum fuel type in mind, and you’ll find that info near your fuel filler cap or in the owner’s handbook. The new E10 fuel, containing 10% ethanol, only applies to standard petrol super-unleaded is still E5. Up until September 2021, all petrol sold at UK petrol stations had an E5 ethanol rating, whether it was standard fuel or super-unleaded. Combining the two types of fuel will give you an octane rating somewhere between the two, which could give slight benefits without the cost of a full tank of super-unleaded. Whether you put a tank of super in every few times you fill up to flush through the engine, or you top up the tank with £20 of the more expensive fuel, it won’t do any damage to your engine. It’s absolutely fine to mix unleaded and super-unleaded petrol. Some people will claim that super-unleaded offers a whole host of benefits over standard, while others don’t agree. They may feature additives to clean the engine and help it run more efficiently, so less fuel is used, and the engine may be slightly longer-lived. The more expensive fuels are often claimed to be better for the environment. When the petrol doesn’t quite ignite when it should, it can also produce a knocking sound and can lead to engine damage if left unchecked. As it’s less likely to ignite before it’s meant to, super-unleaded burns more efficiently than standard petrol and can produce more power in certain engines with finely tuned ignition timing. Standard fuel is often 95 RON, while super is often between 97 and 99 RON. When fuel is compressed in an engine, it’s more likely to ignite, the higher the RON, the higher the pressure it can withstand before igniting. The difference between unleaded and super-unleaded petrol is down to each fuel’s Research Octane Number (RON). What is the difference between unleaded and super-unleaded petrol? Super-unleaded should prove slightly more economical, so you’ll be able to get more miles out of a tank of fuel, and some are said to clean and maintain the internals of your engine. However, super-unleaded petrol continues to be E5, so drivers of many petrol cars built before 2011 have had to switch to the costlier super-unleaded.Įven if your car is cleared to run on the new E10 fuel, you may choose to run it on super-unleaded anyway. E10 petrol features a higher amount of ethanol than the old E5 petrol, and can corrode rubber hoses on certain cars. The introduction of E10 petrol in 2021 meant that some cars could no longer accept standard petrol. What is E10 fuel? Can my car run on E10 petrol? But what’s the difference and is it worth paying extra for? These premium fuels have traditionally been geared towards owners of performance cars, leaving owners of more conventional vehicles to avoid it due to the higher price. Some examples of premium super-unleaded petrol include Esso’s Synergy Supreme+, Shell VPower and BP Ultimate – even the supermarkets offer their own super-unleaded alternatives, including Tesco’s Momentum99. Super-unleaded petrol is more expensive than standard unleaded petrol, has a higher ‘RON’ number and is often given fancier branding. When you pull up at the petrol station you’re often faced with two types of petrol: unleaded and super-unleaded.
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