Readers ask: What Is Aviation Fuel Octane Rating?

What is the octane rating of jet fuel?

The octane ratings of AVGAS, a gasoline -based fuel, are usually either 91 or 100 (lean mixture) and 96 or 130 (rich mixture). The octane rating of jet fuel is much lower, around 15 – this is much more like automotive diesel and thus much more resistant to detonating due to sparks or compression.

Can you use aviation fuel in a car?

Jet fuel can actually be used in cars, but only in diesel engines. Kerosene jet fuel and diesel are actually similar enough to allow for cross-functionality and would provide a similar performance. Both are derived from crude oil, and both run their respective engines on combustion.

Is avgas bad for your car?

When used in a motor vehicle this fuel will leave a lot of lead deposits in the motor. 100LL has a high lead content (0.5 grams per litre), even higher than leaded race fuels. The deposits left when TEL(lead) is burned are corrosive and damaging to valves, valve guides, valve seats and cylinder heads.

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What is the octane of avgas 100LL?

Product Properties

Avgas 100 Avgas 100LL
Motor Method Octane 99.6 Min. 99.6 Min.
Supercharge Rating Performance No. 130.0 Min. 130.0 Min.
Tetraethyl Lead, mL/L 1.06 Max. 0.53 Max.
Colour Green Blue


Is jet fuel a kerosene?

Jet fuel ( Jet A-1 type aviation fuel, also called JP-1A) is used globally in the turbine engines ( jet engines, turboprops) in civil aviation. This is a carefully refined, light petroleum. The fuel type is kerosene.

How much is fighter jet fuel?

The price of jet fuel as of January 2015 is as follows: 170.8 Cents (US dollars) per Gallon.

Will 93 octane increase HP?

1. High octane fuel produces added performance, but only in engines built and tuned to take advantage of it. Running 93 octane fuel in an engine built to run on 87 octane does absolutely nothing except waste money.

What color is aviation fuel?

Jet fuel is a clear to straw-colored fuel, based on either an unleaded kerosene ( Jet A-1), or a naphtha- kerosene blend ( Jet B). Similar to diesel fuel, it can be used in either compression ignition engines or turbine engines.

Can I use 110 octane?

High octane race fuel is sort of the same way. So, the moral of the story is; unless you have at least 12:1 compression (of more), do not run any 110 octane or higher race gas in it or you’ll go slower.

Why is AVgas so expensive?

This fuel is expensive for a number of reasons: 100LL fuel has many more “aromatic” hydrocarbons than mogas (auto fuel) in order to increase the octane levels and prevent fuel from vaporizing in your lines at high altitude. It’s much higher grade, so it costs more.

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Does AVgas burn hotter?

The first is that a two stroke motor will run hotter with AVgas. The higher octane of AVgas makes the fuel burn slower and more efficiently. Also the lead in AVgas helps to dissipate heat and acts as a lubricant.

What is the highest octane fuel?

Premium (the highest octane fuel –generally 91–94)

Can I use 100 octane in my car?

Yep running on pure octane will not hurt the car. It will have slightly less power and fewer MPG but will run just fine. High compression engines need high octane fuel. Putting high octane fuel into a low compression engine will not make it a high compression engine.

What color is 100 130 octane rating?


Grade Colour (Dye) Uses
100LL blue Most commonly used aviation gasoline.
100/130 (“avgas 100”) green (yellow + blue) Mostly replaced by 100LL.
G100UL none Composed primarily of aviation alkylate (same as used for 100LL).
UL102 none Swift Fuels LLC blend of 83% mesitylene, 17% isopentane

Is diesel a octane?

Diesel fuel has an octane rating of 25-40. Mixing 2% diesel fuel into gasoline will lower the overall octane rating by 1 point. Getting 10% diesel contamination lowers octane by 5 points, which is enough to create problems in most engines.

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