So I am needing a minimum fuel grade placard for the RV and have a question about fuel grades that a quick research hasn't answered. The engine manual for my Lycoming clone experimental D2 engine with 8.5:1 compression says:
fuel grade 91/96 or 100/100LL minimum octane aviation fuel
Is 91/96 or 100 avgas even made anymore? Is not I guess the minimum would be 100 LL avgas and should be placarded as such.
The 91/96 spread is confusing and not sure I understand it.
According to this article:
http://www.eaa.org/autofuel/autogas/articles/1Autogas vs Avgas.pdf
mogas octane is about 5 octanes lower when tested on an airplane engine. In other words, a mogas octane of 96 would be needed to have it perform to 91 octane in an aircraft engine. Still, if I am understanding this right, even with comparable octanes and considering ethanol free mogas, there are other differences between mogas and avgas. So I guess mogas at any octane is out?
Thanks for any input.
Jim
fuel grade 91/96 or 100/100LL minimum octane aviation fuel
Is 91/96 or 100 avgas even made anymore? Is not I guess the minimum would be 100 LL avgas and should be placarded as such.
The 91/96 spread is confusing and not sure I understand it.
According to this article:
http://www.eaa.org/autofuel/autogas/articles/1Autogas vs Avgas.pdf
mogas octane is about 5 octanes lower when tested on an airplane engine. In other words, a mogas octane of 96 would be needed to have it perform to 91 octane in an aircraft engine. Still, if I am understanding this right, even with comparable octanes and considering ethanol free mogas, there are other differences between mogas and avgas. So I guess mogas at any octane is out?
Thanks for any input.
Jim