![]() No matter the premium fuel status, though, both gas types contain additive detergents, which clean the engine and support optimal performance. Unless your specific model recommends premium, many older Audi models will perform just as well on regular fuel as they will on premium. Generally, most modern vehicles can safely run on regular gasoline. What's the Difference Between Premium and Regular Fuel?Īccording to data from True Car, fuel economy is the most notable difference between premium and regular fuel, but the octane for regular gasoline is rated at 87 while premium gas is rated at higher levels between 91 and 93. Reducing emissions with more complete combustion.Combusting completely and more efficiently.Supporting and enhancing engine performance.A higher octane level fuel is generally more compatible with a high compression engine and can have the following benefits: Knock can cause some serious damage to your vehicle's engine, which is why performance cars that have a higher compression engine need higher octane gas. The octane rating is always displayed in big, black numbers in a yellow background near gas pump handles, so drivers know which grade is which.Įssentially, the higher the octane rating, the lower the risk of pre-ignition or knock at a higher pressure. In the United States, the octane ratings of unleaded gas range from:Įven though premium gas has an octane rating between 91 and 94, an octane rating of 93 is generally the common premium rating you're likely to see at many gas stations. This 'knocking' is a result of the fuel detonating prematurely inside the engine. The octane rating is the measurement of gasoline's resistance to "knocking" during combustion. If it happens too much, it can damage the engine. On occasion, this may happen, but it's unlikely to harm the vehicle. Higher-octane gas stands up to higher compression before detonation, which means less chance of engine combustion occurring at the wrong time. ![]() It's first important to understand what octane is and how it works in regard to engine combustion. What Is Octane and What Does the Octane Rating Mean? Deciding which of those three numbers-87, 89, and 93-you should choose for your Audi may be more important than you think. When you drive into a gas station to fill up your tank, there are usually three options of gas to choose from: regular, midgrade, and premium unleaded fuel. ![]()
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