mixing any ratio of avgas to autogas is OK. It does increase the octane and stabilizes the fuel.
From some fuel expert:
Avgas has a MON of about 104
regular autogas has a MON of 82.5
If you multiply the MON by the percentage of fuel you can get an idea of the octane.
50/50 mix: (104 x 0.5) + (82.5 x 0.5) = 93.25 MON
75% regular autogas mixed with 25% Avgas: (104 x 0.25) + (82.5 x 0.75) = 87.8 MON
Sorry I don't know how to convert to AKI as we are missing the RON factor.
I really appreciate all the comments. I flew back from Honolulu direct to Kona today... a lot of water underneath. Again, while it was windy as hell--turbulent, the engine seemed to just hum along all day on 89octane ( unleaded; no ethanol ).
Still........, based upon excellent input, I decided today that in ALL future flying I will mix about 1/2half 92 octane ( w/ 10% ethanol ) with 1/2half 89 octane ( w/o ethanol ). This will produce 90.5 octane, with only 5% ethanol, surely a satisfactory overall octane and significant improvement over the pure 89 octant I have been using since buying my CTLS on the mainland, shipping it to Hawaii almost two years ago, and flying all along through-out the islands w/o any adverse efects ( on 89octane ) ever since.
I am fairly new to the Rotax. I have a 912ULS in my RV12. My question is: How do I know if I have a clutch in the reduction gear? If anyone can help I would appreciate it. Thanks Rod
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