What is the highest octane fuel possible?
Retail gasoline stations in the United States sell three main grades of gasoline based on the octane level:
- Regular (the lowest octane fuel–generally 87)
- Midgrade (the middle range octane fuel–generally 89–90)
- Premium (the highest octane fuel–generally 91–94)
Can I run 91 octane in 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.
Which is the correct octane rating for gasoline?
Selecting the Right Octane Fuel. What is octane rating? Octane rating is the measure of a fuel’s ability to resist “knocking” or “pinging” during combustion, caused by the air/fuel mixture detonating prematurely in the engine. In the U.S., unleaded gasoline typically has octane ratings of 87 (regular), 88–90 (midgrade), and 91–94 (premium).
Is it safe to use 85 octane fuel in my car?
This is not true for modern gasoline engines. So, unless you have an older vehicle with a carbureted engine, you should use the manufacturer-recommended fuel for your vehicle, even where 85 octane fuel is available.
Do you have to pay premium for octane fuel?
If your owner’s manual says your vehicle doesn’t require premium but says that your vehicle will run better on higher octane fuel, it’s really up to you. The cost increase is typically higher than the fuel savings.
What’s the minimum octane for a high altitude engine?
In the Rocky Mountain (high elevation) states, 85 AKI (90 RON) is the minimum octane, and 91 AKI (95 RON) is the maximum octane available in fuel. The reason for this is that in higher-elevation areas, a typical naturally aspirated engine draws in less air mass per cycle because of the reduced density of the atmosphere. This directly translates …
What’s the minimum octane rating for a car?
A minimum 82 octane fuel is recommended for most vehicles produced since 1984. Older cars with carburetors could operate with lower octane fuel at higher elevations. Regardless of legality fuel with an octane rating of less than 82 is generally not offered for sale in most states.
What’s the difference between 98 and 95 octane gas?
98 RON translates into 94 octane US, 95 RON translates into 91 octane gas. This has been discussed in other posts, but the bottom line is if you want best performance and fuel economy, find a way to get 94 octane gas.
What is the octane rating for a gas pump?
In the United States and Canada, octane ratings are in AKI, commonly shown as “(R+M)/2”. All states require gas pumps to be labeled with the correct octane level and nearly all states do regular testing to make sure gas stations are in compliance.
Can you sell gasoline with an octane rating of 82?
Regardless of legality fuel with an octane rating of less than 82 is generally not offered for sale in most states. However 85 and 86 octane gasoline can still commonly be found in several rocky mountain states.