ASTM D is the major specification covering Aviation Gasoline. and it is anticipated that the Grade 91 will now be removed from ASTM D freeing up. This standard is issued under the fixed designation D; the . last published in Specification Dā€“94 in the Annual Book of ASTM. ASTM D Standard Specification for Leaded Aviation Gasolines.

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In demonstrations awtm in JulyGUL performed better than LL that just meets the minimum specification and equal to average production LL. They cited that the aviation sector employs more than 1.

ASTM D – 11 Standard Specification for Aviation Gasolines

Aircraft Owners and pilots Association. Octane Engine Testing, St. Common ethanol fuel mixtures. AOPA interprets the new regulations as not affecting general aviation as they are currently written. The United States Environmental Protection Agency EPA has noted that exposure to even very low levels of lead contamination has been conclusively linked to loss of IQ in children’s brain function tests, thus providing a high degree of motivation to eliminate lead and its compounds from the environment.

Do not wash down spills with water. Only later versions of the airframe with different engine cowling and exhaust arrangements are applicable for the automotive fuel STC, and even then require fuel-system modifications. Aviation Gasoline dyed green is excellent ashm use in piston engine powered private planes, d190 commercial aircraft, and combat-type planes during military training procedures.

Retrieved 23 August Archived from the original on 10 August Confusion can be caused by the terms Avtur and AvJet being used for jet fuel. The use of unleaded auto fuels with engines designed for leaded fuels can result in excessive exhaust valve seat wear due to the lack of lead. A larger problem stems from the higher and wider range of allowable vapor pressures found in automotive gasoline; this can pose some risk to aviation users if fuel system design considerations are not taken into account.


Care must be taken by small airplane pilots to select airports with avgas on flight planning. Components Propeller governor Propeller speed reduction unit Spinner.

It was used in engines with low compression ratio. For example, US and Japanese recreational pilots ship and depot avgas before flying into Siberia.

TEL found in leaded avgas and its combustion products are potent neurotoxins that have been shown in scientific research to interfere with brain development in children.

No information has yet been published in its performance, producibility or price. Some of the lower-powered ā€” horsepower or 75ā€” kilowatts aviation engines that were developed in the late s are designed to run on unleaded fuel and on LL, an example being the Rotax The second number indicates the octane rating of the fuel tested to the ” aviation rich ” standard, which tries to simulate a supercharged condition with a rich mixture, elevated temperatures, and a high manifold pressure.

Avgas – Wikipedia

Archived from the original on 13 February Avgas is distinguished from mogas motor gasolinewhich is the everyday gasoline used in motor vehicles and some light aircraft. Company general manager Michael Kraft stated that aircraft owners do not realize how much performance would be lost with 94UL and characterized the decision to pursue 94UL as a mistake that could cost the aviation industry billions in lost business. Northwestern University Medill School of Journalism.

In such fuels, the lead acts as a lubricant, coating the contact areas between the valve, guide, and seat.

Automotive gasoline can vaporize in fuel lines causing a vapor lock a bubble in the line or fuel pump cavitation, starving the engine of fuel. Friends of the Earth has filed a petition with EPA, requesting that EPA find pursuant to section of the Clean Air Act that lead emissions from general aviation aircraft cause or contribute to air pollution that may reasonably be anticipated to endanger public health or welfare and that EPA propose emissions standards for lead from general aviation aircraft.


Archived from the original on 7 May Alternatively, Friends of the Earth requests that EPA commence a study and investigation of the health and environmental impacts of lead emissions from general aviation aircraft, if EPA believes that insufficient information exists to make such a finding. This fuel is not currently in production and no refiners have committed to producing it.

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet MSDS are followed.

As of [update]82UL is not being produced and no refiner has announced plans to put it into production. Jet fuel is similar to kerosene and is used in turbine engines; it is not avgas.

Retrieved 10 May Auxiliary power unit Coffman starter Hydraulic system Ice protection system Recoil start. By using this site, you agree to the Terms of Use and Privacy Policy. Avoid breathing the vapors and skin contact.

SuperCharge Octane Testing for Aviation Fuels

According to their August chart, a number of their engines are compatible with unleaded fuel. InSwift Fuels LLC was formed to bring in oil and gas industry experience, scale up production and bring the fuel to market. UL94 is not intended to be a full replacement for LL but rather is designed to be a drop-in replacement for aircraft with lower-octane-rated engines, such as those that are approved for operation on Grade 80 avgas or lowerUL91, or mogas.

Note that properties critical to aviation use for example, vapour pressure and cleanliness are not controlled to the same degree in automotive motor gasoline manufacture and handling. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Retrieved 8 July Astn Octane Number min