Le Forum de http://www.dreamplanet.tk

A bit more information, translated with Google so may not read as it should!

Total confirms the arrival next year of a fuel (Avgas 91UL) specifically designed for use on ultralight powered by Rotax. Unlike automotive fuel (95LL and 98SP), 91UL is the "specified for aviation use. It responds to "quality standards and strict specifications" such as risk of reduced vapor-ock, absence of alcohol (ethanol) is harmful to fuel system components, less gum, no additives not approved for Aviation, calorific guaranteed. The tanker announcement that "production of this fuel will benefit from the strict controls set aside for aviation products."

Only where the Rotax, the 91UL has been added to the list by Rotax's Service Instruction for 912 UL / A / F, 912 ULS / S and 914 UL / F

Note that the UL 91 Avgas will be more expensive than automotive fuel given its characteristics and quantities produced, well below those of the automotive market but the price is announced "lower than Avgas 100LL. The 91UL should be available in late 2010, with an initial installation on two airfields "pilot". The progressive deployment of the distribution will occur "during 2011" without specifying under what conditions, some aerodrome spot a tank set for 100LL ... The distribution of the 91 UL should theoretically solve the problems of air-refueling clubs using school aircraft type CS-VLA Rotax motor and having far as the 100LL on their home field.

Avgas 91 UL has "in no way intended to replace Avgas 100LL" Total property, but said it planned to reduce the lead content of 100LL to limit emissions of fuel into the atmosphere. " This project, designed a "reduction of 15 to 25% rate of lead" could become reality next year.