Is unleaded 87 regular gas
Emily Dawson
Published Apr 09, 2026
Gasoline with an octane level of 87 is considered “regular,” with gasoline sold at 89 octane often labeled “midgrade” by most gas stations.
Which gas is better 87 89 or 93?
Regular gas is rated at 87 octane in most states, while premium gas is often rated higher at 91 or 93. … Essentially, the higher the octane rating, the lower the likelihood that detonation happens at the wrong time. On occasion, this occurrence will likely not harm your vehicle.
Is unleaded 91 regular unleaded?
Standard unleaded petrol is 91. … The ethanol-blended E10 (a mixture of up to 10 per cent ethanol in petrol) is a substitute for 91 in most cars 2005ish or newer. However, it pays to check your user manual. Those numbers – 91, 95 and 98 – are the so-called ‘octane rating’ of the fuel.
Is 87 and 89 gas the same?
Octane is how much compression a fuel can withstand before igniting, or rather it’s a measurement of a fuel’s ability to avoid knock. … Typically “regular” gas is 87 octane, “midgrade” is 89 octane and over 91 octane is “premium” gasoline. Some states label top-tier gasoline with 93 octane as “ultra” gas.Is unleaded gas okay for my car?
“Use premium unleaded gasoline with a posted octane rating of 91 or higher. If the octane rating is less than 91, you could damage the engine and may void your vehicle warranty. … Some manufacturers recommend premium gas but say that regular or mid-grade gas can be used instead.
Is 87 gas bad for your car?
Let’s start with the easy one. Most cars on the road recommend a standard grade 87 or 89. Premium gas 90-93 is completely okay to put in a standard vehicle. Car experts say there is no risk of damage to a standard car using premium fuel.
Is 87 or 88 gas better?
Unleaded 88 burns cleaner and cooler than regular unleaded gasoline. NASCAR mechanics, automakers, and regulators all agree Unleaded 88 is safe, affordable, and a greener choice for engines.
What happens if I use 89 instead of 87?
Is it okay to mix 87 octane and 89 octane fuel together in my car? Yes. You will not harm your car by mixing different octane grades of the same gasoline providing your car’s engine is designed to run on less than 89 octane fuel and you are not using E85 in a non-E85 compatible engine.What happens if you put 93 gas instead of 87?
If you usually fill your tank up with 87-octane gasoline and you accidentally put in a higher octane blend (say, 91, 92, or 93), don’t worry. … You’re actually filling your car or truck with a different blend of gas, which means it will burn differently in your engine.
What are the 3 types of gasoline?- Regular (the lowest octane fuel–generally 87)
- Midgrade (the middle range octane fuel–generally 89–90)
- Premium (the highest octane fuel–generally 91–94)
Is premium gas unleaded?
Premium gas- is often referred to as “high octane” because its 90 or higher octane rating. It’s an unleaded, crude oil by-product with detergent additives and less polluting characteristics. Octane rating refers to the ability of fuel to withstand improper combustion in an engine.
What's the difference between 87 and 91 gas?
Two common octane ratings are 87 and 91. The main difference between 87 and 91 octane gas is just the additive that they add to it. They are still the same unleaded gasoline that will work on your car. … An 87 octane gas is more prone to pre-detonation since it ignites at a lower temperature than 91 octane gas.
Is petrol same as unleaded?
Unleaded fuel is also known as petrol or gas depending on where you live. … The term “unleaded” means regular gas, diesel gets its name because it’s a completely different type of fuel. Petrol engines run off unleaded fuel by combining gas and air to compress and ignites the engine with a spark.
What is the difference between unleaded 91 and 98?
What’s the difference between 91, 95 and 98 petrol? These numbers represent the octane rating (RON) of the fuel. Australia’s current standard fuel is 91 RON and most cars sold since 1986 were built to use it effectively. Ninety-five and 98 have a higher RON and are considered premium fuels.
Is extra 95 unleaded fuel?
The Australian standard for Premium Unleaded requires a Research Octane Number of Octane 95.0 minimum. The fuel suitable for your vehicle would be Premium 95 RON or for additional octane, Premium 98 RON. Unleaded 91 and E10 94 do not meet the minimum RON requirement for Premium Unleaded Petrol.
Is regular gas unleaded?
Unleaded gas (regular) The most commonly used fuel for vehicles is regular unleaded gasoline (RUG). … The octane rating for this fuel is 87, which refers to its ability to deal with improper fuel combustion in an engine.
What gas should I use for my car?
The best type of gas to put in your vehicle is whatever octane level your car’s owner’s manual specifies. Generally, here’s what you need to know about octane gas types: Regular fuel is 87 octane.
Is it OK to mix premium and unleaded?
Can I mix premium and unleaded gas? Yes, drivers can mix the two types of fuel. The combined gas types will result in an octane level somewhere in the middle — something the vehicle “will survive,” according to The Drive.
Is unleaded 88 the same as 89?
Unleaded 89 This fuel is sometimes labeled as “mid-grade” because it has a higher octane than unleaded 88 but lower than 91 or 93. But it’s also more expensive than unleaded 87 and 88.
Can you mix 87 88 gas?
Mixing premium and regular gas is not generally recommended, but doing so will have minimal impact on a vehicle’s immediate performance. Only premium cars that require higher octane gasoline may see a minor performance decrease or engine knocking.
Is unleaded 88 the same as super unleaded?
Unleaded 88, also known as, E15 is a higher-octane fuel made from 15 percent ethanol and 85 percent gasoline. Unleaded 88 provides a slight boost in octane for your engine and contains just 5 percentage points more ethanol than 87 octane Super Unleaded E10, the most commonly used fuel in the nation.
Is 87 and 85 gas the same?
In the U.S., unleaded gasoline typically has octane ratings of 87 (regular), 88–90 (midgrade), and 91–94 (premium). Gasoline with an octane rating of 85 is available in some high-elevation areas of the U.S. (more about that below).
Does premium gas last longer?
Sadly, there’s nothing in premium gasoline that would make it last longer than other fuels from the pump. Since the distinguishing feature is the higher-octane levels, the only real benefit you gain is lowering the chance of engine knocking, which isn’t much of a threat on most modern fuel systems.
Is unleaded 88 bad for your car?
A: Unless the owner’s manual says your car can handle 15 percent ethanol, you could harm your engine in the long run. The 88 octane should have no effect if you happened to fill you tank with it once, but prolonged use by a car not equipped for it can cause an engine to wear out faster.
Will premium gas clean my engine?
Nope. Regular, plus, and premium gas all come with detergents to mitigate against carbon deposits in your engine. Plus and premium don’t come with special powers for cleaning out the engine. If you’re interested in cleaning out your engine, you’re better off taking it in for service.
Does premium gas do anything?
Typically, high-performance cars require premium, because their engines have higher compression ratios, while other cars can run just fine on lower octane gas. … The FTC sums it up this way: “In most cases, using a higher octane gasoline than your owner’s manual recommends offers absolutely no benefit.”
Is it bad to mix 85 and 87 gas?
your car will be fine with that. The octane rating is just a MINIMUM your engine needs – anything from that octane upwards will work just fine. You’ll be fine. A 50/50 mix of 85 octane and 87 octane will just give you 86 octane.
What are the different grades of unleaded petrol?
- Premium Unleaded (95 RON) …
- Super Unleaded (97 / 98 RON) …
- Premium Fuels (e.g. Shell V-Power) …
- ‘Cetane rating’ explained. …
- City diesel and low-sulfur diesel. …
- Premium diesel.
How can you tell if gas is unleaded?
Unleaded gasoline is fuel with an octane rating of around 87. However, the DOE says there are three different octane ratings for fuel: Unleaded Fuel: 87. Mid-grade Fuel: 88-90.
What color is unleaded gas?
Colors According to the Types of Gasoline Regular – regular gasoline is usually greenish or slightly bluish in color. Midgrade – midgrade gasoline is usually yellowish in color. Premium – premium, the one with high octane ratings, is usually pink in color.
Is Petron XCS unleaded gas?
Petron’s fuel formulation partner, Associated Octel Co. of the UK, explained that XCS Plus Valvemaster is the only unleaded premium gasoline that has a phosphorus-based lubricant in place of lead to protect cars from valve seat recessions.