types of gasoline

Types of Gasoline

Types of Gasoline – Gasoline is a fuel produced from refined petroleum for internal- combustion engines. It is the most demanded item found in the US and so, consumed on a larger scale. The reason why you should be interested in this article is that your vehicle has certain requirements related to fuel, and you must not damage its engine by choosing a type of gasoline, which is not right for your vehicle.


The types of gasoline differ from area to area, but if we talk about THE UNITED STATES OF AMERICA, we will come across “Three types of gasoline.”

  • Regular gasoline
  • Midgrade gasoline
  • Premium gasoline

All three of them have their own identity and benefits. Different types of gasoline help the consumer to identify the best choice for their vehicle. All the types of gasoline are the same as produced by oil, but the outer procedures and treatment make them different. The right gasoline will make your car trouble-free and protect its engine from combustion.


In the USA, you would often hear about regular, midgrade, and premium but with some odd numbers such as 87, 89, and 91 or 92. Sometimes it’s very confusing for the driver to understand it and make the right decision about choosing a certain type of gasoline if he/she seeks a change. “Regular” is also known as unleaded gasoline in some parts of the US. Regular fuel has octane’s rating, which lay between 85 to 88, with an average of 87. It is the lowest octane rating. This type of gasoline is cheapest from all. “Midgrade” is also identified as Plus or super. This type of gasoline has an octane level of 88 to 90, with an average of 89. It is neither too expensive nor falls under the cheapest range. “Premium,” Also known as super-premium, is the most expensive type of gasoline provided in the USA. It has an octane level above 90, with an average of 92.  These are the types of gasoline found in the United States.


The types of gasoline are differentiated by octane rating. There is a term called “Engine knock” which produces a knocking sound. It is a warning regarding engine destruction. What happens in engine knock that the air-fuel charge does not ignite from the spark plug rather some outside packets result in ignition within the engine. Gasoline, which has a higher octane rate can withstand engine knocks and provide the engine with smoother running.

types of gasoline

Contrary to this, the lower the octane levels the lesser the resistance level of engine knocks within the engine. As premium has the highest octane level so vehicles using this type of gasoline will keep up with the engine knocks, whereas midgrade would be less defensive and regular will be much less than the rest. Another difference between the types is the “gasoline’s burning rate.” All three of the types burn differently. Higher the octane rating more difficult for the gasoline to burn, lower the octane level easier it burns. There are some vehicles which require optimal gasoline-burning level because if they burn more, then it violates the law. When gasoline burns, it produces heat, which helps the engine to work well, but the more it burns, it creates pollution. The clean air act in the United States of America requires less air pollution. The combustion level of gasoline is different from each other while they heat and energy, they produce remains the same. Premium has a higher octane level; midgrade has medium whereas regular has average rating level. Their differences make them stand out in different consumption environments. 


Before trying to solve this equation by yourself or before involving any other person or a third party, look forward to your manufacturer’s recommendation BECAUSE THE MAKER KNOWS IT ALL. The manufacturer of the car would know the type of engine and other related issues so, the suggestions about gasoline’s type will be what suits your vehicle THE BEST. The code which explains the gasoline type is termed as “fuel requirement,” and it will be founded inside the fuel door. You can check there, and it will be written with the word “Only,” It explains the essence of using a certain type. Second, there are many cases where your vehicle recommends premium fuel, but it can work well on regular fuel. For example, some vehicles (especially modern cars) have knock sensors that detect engine knocks automatically and make amendments so that the engine can do its work without facing any failure. In such cases, if your car uses regular fuel, then it is okay as the risk of knock will not be there. This option is useful for those who don’t want to pay extra money on premium fuel and are okay to use regular, but here is a thing and that is “such vehicles cannot taste their full potential” so, it is up to the driver.

There is a big misconception about premium fuel, and that is it can make the car easy-going. Thus, many people use premium fuel so that their vehicle’s performance reaches its best. Well, to be fair, all the types of gasoline which are commercially sold in the US have engine cleaning detergents by the environmental authority, so every gasoline does that. The major thing is the RIGHT AMOUNT OF OCTANE LEVEL because it protects your car, and every vehicle has a different requirement, so the manufacturer’s choice is the best one from our point of view.

ALSO, many people want to use both premium and regular as per their availability and choice, but using them both cannot make the vehicle’s performance any better. It is better not to do experiments with the engine. Premium is far more expensive than regular, so if your car manual is recommending regular, but you want to use premium KNOW THAT it will be your own choice, but it cannot benefit your car on a significant base.