Often asked: What Happens If To Aviation Fuel Grades Are Mixed?

What happens if you mix aviation fuels?

Color Identification: Note that water and/or Jet A fuel mixed with the common 100LL will still appear blue, albeit not as blue. Water will separate from fuel however, unlike Jet A which will remain mixed.

What happens when 100LL and 100 fuel mix?

If you mix 100 /130 and 100LL you get greenish-blue. I guess they didn’t find it necessary to make the dyes cancel each other out since airplanes originally designed for 100 /130 would also run on 100LL.

Can you mix 100LL and Mogas?

Yes, the STC does state it’s fine to mix the two but doesn’t state whether or not the 100ll can be used to boost the octane to meet the requirement.

What grades of aviation fuel are available for use?

There are two main avgas grades (100 and 100LL low lead) used in the general aviation community. In each of these types, the numbers represent the octane rating. There are also other types of avgas that are either rarely used or no longer in production.

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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.

How high is the octane in aviation fuel?

Modern aviation unleaded fuels are currently being developed, such as 82UL in the United States. This is an 82 Octane Lean Mixture rating fuel and is approved for use in modern non turbo Avco Lycomings engines amongst others.

What color is 80 octane fuel?


Grade Colour (Dye) Additives
80 /87 (“avgas 80 “) red (red + a little blue) TEL
82UL purple (red + blue) ASTM D6227; similar to automobile gasoline but without automotive additives
85UL none oxygenate-free
91/96 brown (orange + blue + red) TEL


What color is 100 130 octane rating?

Green: AvGas 100 ( 100/130 Octane ) Blue: AvGas 100LL ( 100/130 Octane ). This was formulated as a replacement for AvGas 100, with half the lead, thus the name 100LL for Low Lead. Red: AvGas 80 (80/87 Octane )

Can you mix Mogas and avgas?

If the plane is approved for Mogas by STC you can mix Avgas and Mogas. I do it all the time in my Warrior. I have done it a couple of times (use car petrol) to a limited degree, with the SR20 (Continental IO-360, [email protected] RPM, CR 8.5:1) when I flew in the east of Europe.

What is Mogas in aviation?

Mogas (also called autogas) is lead-free, ethanol-free gasoline that meets ASTM D4814 specifications, which includes most automotive fuel. Mogas has been an FAA-approved aviation fuel since 1982, when the first mogas STCs were approved.

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What is the difference between avgas and race fuel?

AvGas has a lower specific gravity than most racing gasolines. This means that if a racer tries AvGas and has not re-jetted, he can burn a piston because the air- fuel ratio is too lean and/or the engine detonated. To make a good comparison between two gasolines, the air- fuel mixtures must be the same.

How much does aviation fuel cost per gallon?

170.8 Cents (US dollars) per Gallon.

Can you run 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.

Why is aviation fuel 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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