Quote:
Originally Posted by edward7048
for those using 100LL in a RV-12 with Rotax 912 ULS and decalin
what ratio are you using? I have only been using 92 octane without
ethanol or 93 octane with ethanol. I am planning a couple of
cross country trips this summer and will have to use 100LL only.
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I think it tells you on the bottle of Decalin, but yes it's ? oz per 10 gals. The bottle I have has a little graduated cup next to the regular bottle cap. If you loosen the bottle a little you can gently squeeze the required amount into the measuring cup. Then simply unscrew the cap and pour into the tank.
Pour in before or after fueling, makes no difference. You might notice a little white color on the end of the exhaust pipe after you've burned 100LL a while it's the lead.
Depending on how much you use, you'd need to adjust your oil change interval and if you remove the tank to clean the lead sludge out you'll need to make sure the oil lines are purged/pressurized afterwards. Your Rotax mechanic can help you with this if you don't already know.
Check around your route there are some airfields with 93 non-ethanol on the pump but they're not always well advertised. I have one near me in SC and know of 2 in VA and one in TN. Might as well use it if you reach it?
Have a great trip!
