Avgas UL91 & UL94

UL91 has been supplied at many airfields for a number of years. UL94 (similar to UL91 but with a slightly higher octane rating) is now becoming available.  

These fuels are suitable, and approved, for a wide range of engines types used in LAA aircraft. With 100LL being phased out over the coming years, now is an ideal time to see if your engine is compatible and help do your bit for the environment.

The LAA Airworthiness Approval Note (AAN) for use of UL91 & UL94 in appropriate LAA aircraft can be found here. It contains a list of the most popular types of engines for which the fuel is suitable.

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The EASA document pertaining to use of UL91 in non LAA types is available here.