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All about AVGAS UL91 aviation gasoline

What do you know about AVGAS UL91 ? 


AVGAS UL91 is an unleaded aviation gasoline specially designed for microlight aircraft, with the letters UL designating "unleaded". 

The formulation contains no alcohols such as ethanol, and was designed to protect the fuel tanks and lines. Alcohols can damage certain materials and have the disadvantage of absorbing water. 

Essence avion
Essence avion

How can you identify AVGAS UL91 at a service station? 


AVGAS UL 91 is marked in airport refueling facilities in white letters against a red background with a green border. This clear labeling was designed to prevent any "misfuelling", with AVGAS 100LL or JET A-1 being erroneously used instead. Similarly, AVGAS dispenser nozzles are painted in red and JET A-1 nozzles in black. 

AVGAS UL 91 characteristics


Strict specifications

AVGAS UL 91 complies with the international standard ASTM D7547. It is unleaded aviation gasoline specially designed for microlight aircraft with spark-ignition piston engines. It has a lower octane number than AVGAS 100 LL. 


Ongoing quality monitoring

TotalEnergies offers AVGAS UL91 that complies with international standards and specifications, and is fully traceable from the refinery to the aircraft. In addition to this, TotalEnergies Aviation has added its own procedures and checkpoints to guarantee product quality throughout the logistics chain.