Engines that use petrol work in a different way to diesel engines. Petrol engines are spark ignition internal combustion engines, meaning that the fuel is ignited through a spark from a spark plug.
If the ignition happens early or is mistimed then a metallic pinging noise is heard, known as knocking. This can damage the engine badly, and if you notice it let your garage know so they can advise on the next step. The petrol that we see on the forecourts is a product of petroleum and is a different fuel to diesel, even though it is made from the same base product. Petrol types are measured in octane numbers and ratings depending on the resistance to autoignition.
Knock occurs when the fuel-air mix in the cylinder explodes instead of burning in a controlled way. If fuel has a high octane number, it will have a higher resistance to engine knocking. Usually, there are three different octane numbers associated with all kinds of petrol. Prolonged exposure to large amounts of lead can eventually cause lead poisoning, which can be fatal. As the negative effects of lead were discovered, governments were keen to remove leaded petrol from regular use.
They started off with different tax rates for leaded and unleaded petrol, then some eventually resorted to banning leaded petrol altogether and imposing very stiff fines for those caught possessing or using it. Still, there are some areas where the use of leaded petrol is still allowed. A few examples include motor racing, heavy equipment, and marine vehicles. Even though leaded petrol is no longer available at the pump, the name of unleaded petrol has stuck ever since.
Oil companies have also managed to find alternative additives to increase the octane rating of their petrol without using lead. As long as you use the recommended petrol for your vehicle, you should have no problems whatsoever. Leaded petrol creates more pollution than unleaded petrol.
Leaded petrol poses more of a health risk than unleaded petrol. Unleaded petrol is available for public consumption while leaded petrol is banned. Cite APA 7 , l. Difference Between Similar Terms and Objects. MLA 8 , lanceben. The information provided is very useful,because before visiting this site,i had no idea about the difference between leaded an unleaded now im understand it.
You can note here that Power is a kind of premium petrol and normal is unleaded. The main difference between regular and power fuel is that power or premium fuels have a higher number of octane. Usually, in the country, different kinds of petrol have different numbers of octane.
Regular petrol or unleaded petrol has octane ratings of 87 typically. In midgrade petrol, the number of octanes varies from 88 to In premium or PoWer petrol, there is a higher number of octane, i. There are several advantages of fueling your vehicles with power fuel.
In summary, Power petrol has a higher number of octanes than standard petrol.
0コメント