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 D–94 in the Annual Book of ASTM. ASTM D Standard Specification for Leaded Aviation Gasolines.

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This does not constitute an insurmountable obstacle, but merely requires examination of the fuel system, ensuring adequate shielding from high temperatures and maintaining sufficient pressure in the fuel lines. Octane Engine Testing, St. A Tilt Toward Natural Gas”. Retrieved 19 June AOPA interprets the new regulations as not affecting general aviation as they are currently written.

In Europe, environmental and cost considerations have led to increasing numbers of aircraft being fitted with fuel-efficient diesel engines that run on jet fuel. This 94UL meets the avgas specification including vapor pressure but has not been completely tested for detonation qualities in all Continental engines or under all conditions.

The D test measures fuel performance under severe conditions in higher performance engines. Avgas has a lower and more uniform vapor pressure than automotive gasoline so it remains in the liquid state despite the reduced atmospheric pressure at high altitude, thus preventing vapor lock. Retrieved 11 September Retrieved 3 October Archived from the original on 10 August Historical Version s – view previous versions of standard. Archived from the original on 24 February This is the main reason why both the specific engine model as well as the aircraft in which it is installed must be supplementally certified for the conversion.


The EPA responded with a notice of petition for rulemaking. Confusion can be caused by the terms Avtur and AvJet being used for jet fuel. In Europeavgas remains the most common piston-engine fuel.

ASTM D – 17a Standard Specification for Leaded Aviation Gasolines

Retrieved 29 July Prevent all spills from reaching water. This fuel is not currently in production and no refiners have committed to producing it.

Components Propeller governor Propeller speed reduction unit Spinner. Phased out in the late 20th century. Avgas is distinguished from mogas motor gasolinewhich is the everyday gasoline used in motor vehicles and some light aircraft. Lycoming provides a list of engines and fuels that are compatible with them.

AKI is the octane rating used to grade all U.

Some certificated reciprocating-engine aircraft still require leaded fuels, but some do not, and some can burn unleaded gasoline if a special oil additive is used. Supercharge testing can be a requirement for Avgas quality. On dd910 Novemberthe environmental group Friends of the Earth formally petitioned the EPA, asking them to regulate leaded avgas.


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 r910 to endanger public health or welfare and that EPA propose emissions standards for lead from general aviation aircraft.

SuperCharge Octane Testing for Aviation Fuels

This page was last edited zstm 16 Decemberat Retrieved 13 May This specification covers purchases of aviation gasoline under contract and is intended primarily for use by purchasing agencies. Retrieved 10 May Dd910 28 October Unleaded avgas is also available. Vapour Pressure, kPa The petition submitted by Friends of the Earth explains their view that lead emissions from general aviation aircraft endanger the public health and welfare, creating a duty for the EPA to propose emission standards.

Aviation Gasoline dyed green is excellent for use in piston engine powered private planes, most commercial aircraft, and combat-type planes during military training procedures. It does not include all gasolines satisfactory for reciprocating aviation engines.