You can change your cookie preferences or learn more about the cookies we use. Our doors are back open safely.
We're ready when you are. Click here for more info. Home Blog. Premium Fuels e. Premium diesel As with petrol, some manufacturers offer premium diesel too. Considerations If you cover a lot of miles, travel on the motorways often, or you need to tow something, diesel engines are better suited. Considerations If you are looking to use LPG, you will only see the benefit if you do high mileage or are planning on keeping your car for a few years.
Biofuels biodiesel and bioethanol Biodiesel is made up of rapeseed oil and other plant oils, and bioethanol is made up of sugar cane sugars, wheat, and other plant resources. Electric Battery Electric Vehicle — BEV An electric vehicle uses a motor that is powered by a rechargeable plug-in battery; that means absolutely no forecourt fuel is required.
Considerations Electric vehicles can be used for journeys of any length, though you may need to factor in some charge-point planning if you have a particular long trip in mind.
Related Posts Hire Purchase Explained. Personal Contract Hire Explained. This denotes how quickly the fuel burns in the combustion chamber the faster it burns, the more efficient it is. The cetane rating between regular and premium fuels hardly varies. Where premium diesel differs is by having increased detergents and additives. These are designed to make the fuel burn more cleanly and minimise the build-up of deposits in the engine compared to regular diesel.
As with premium petrol, they are unlikely to improve mpg significantly. Independent tests by What Car? Find out more Accept. Claims of better mileage could be attributed to driving habits and their vehicles engines than to the fuel itself.
Therefore, there is likely no real advantage to use either fuel. Knock occurs when the peak of the combustion process no longer occurs at the optimum moment for the four-stroke cycle. Effects of engine knocking range from inconsequential to completely destructive.
So be sure to pay attention to your engine. If you consistently hear knocking, it could spell trouble for your engine and can cause severe damage. So how does knocking relate to our fuels? The main difference between Ron 97 and Ron 95 is resistance to knocking. Ron 97 can withstand the higher pressures in a high-performance engine and therefore produce no knocking. Even so, Ron 95 is still a good fuel but it will produce knocking if your engine is powerful.
Naturally aspirated engines delay the point at which combustion is triggered retarding the ignition if knock threatens, all of which brings us back to the question of whether you need to fork out the extra dosh for super unleaded. The difference between premium and super unleaded at the UK forecourt these days is a maximum of two points 97 octane versus 99 and the chance of a modern engine being damaged by the lower of the two is nil.
However, the engineers calibrating higher-performance engines and chasing the best performance numbers are likely to have done so using the highest-octane pump fuel available. The higher octane allows the engine to use a higher boost pressure and more aggressive settings to pump out a little more power. With the lower octane, it may back off those settings a tad to stay below the knock threshold.
Whether you can notice the difference subjectively, though, is down to how attuned you are to your car.
0コメント