For those who are curious about whether to buy premium or regular gas, this short guide will explain the different types of gas for cars and what you should know.
Gasoline is mainly used as an engine fuel in vehicles. Petroleum refineries and blending facilities produce motor gasoline for sale at retail gasoline fueling stations. There are three different types of gas at most U. You might also see the different gas grades referred to as unleaded, super, or super-premium. Using the right fuel for your vehicle can boost its performance and efficiency.
Corrosion inhibitors reduce the corrosion rate of any metal they come into contact with. There are many types of additives, all designed to benefit the health of your engine and prolong its life. The Shell name has been around a long time, over years, in fact. The draw with Shell gas is its nitrogen-enriched formula. Which they claim helps remove deposit buildup and prevent further growth. Dating back to the mids, Mobil is one of the best-known names when it comes to quality gasoline.
In , they merged with Exxon to form Exxon Mobile, making it one of the largest oil companies in the entire world. Their secret is Mobile Synergy, a unique blend of 9 different additives.
A few of these include 3 different detergents, a friction modifier, and a corrosion inhibitor. Costco sells just about everything, and as of , it began selling gas. Not only is Costco gas Top Tier certified, but it also carries the benchmark of being a Kirkland Signature product.
Modern cars usually have knock sensors that prevent this. The octane of your gasoline has nothing to do with how much energy is in the fuel. It is a measure of how easily your air-fuel mixture ignites.
Higher octane means the gasoline you are using has a greater resistance to preignition. That is to say, it requires greater agitation to ignite it. That is all that the octane level indicates. Many premium cars generate greater power by using a higher fuel-air compression ratio in the engine. Because the mixture is more compressed, it generates more heat and thereby is more likely to ignite early.
Higher octane gasoline is more resistant to this problem. Your gas cap or instructions near the gas cap should indicate if your car requires premium fuel. If your car requires premium gas and you use a lower octane like 87, you can expect knocking, preignition and engine damage particularly if you have an older model vehicle. If you have a modern car, your knock sensor will kick in to prevent preignition, but this will reduce your engine power and diminish fuel economy, so you will lose more money than you save by using the cheaper gas.
If this is the case, you may want to just go with the cheaper gas, or experiment and see if the amount you make up in fuel economy and the difference in power is appreciable enough to justify the higher cost of the premium fuel. What about the other way?
AAA said it was surprised to find that detergent additives made such an impact on gasoline quality. The group is now urging drivers to use a gasoline that meets Top Tier standards for engine cleanliness and performance. Such carbon deposits are known to reduce fuel economy, increase emissions and negatively impact vehicle performance, particularly on newer vehicles.
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