dick seiders
Well Known Member
I believe this may have been discussed already, but can't find it, sorry.
Madison Airport (52A) only 19 mi. from my home base (9A1) has installed a tank and is going to start selling car gas that is rated for aircraft. It is (guarenteed) 90 octane with NO ethanol, and is called Recreational Aviation Fuel. The airport is run by the county so will add only 15 to 20 cts. more than 91-93 sold at gas stations that does include ethanol of course. My question: is the 90 octane rating sufficient for the Rotax 912 ULS? All the info I have seen usually calls for 91-93 oct. Don't know if this is due to fact that is the state (Fed?) gas station rating for cars, or is it because it is the min. for the 912 when referred to for our engines? I'd like to be certain as I don't want to use an octane that may detonate in the engine.
This issue becomes more important down the road as I hear that our omnipotent Gov/EPA is planning on boosting the ethanol from 10 to 15%, or maybe even 20% in the not too distant future. Interested in comments please, and thanks.
Dick Seiders
Madison Airport (52A) only 19 mi. from my home base (9A1) has installed a tank and is going to start selling car gas that is rated for aircraft. It is (guarenteed) 90 octane with NO ethanol, and is called Recreational Aviation Fuel. The airport is run by the county so will add only 15 to 20 cts. more than 91-93 sold at gas stations that does include ethanol of course. My question: is the 90 octane rating sufficient for the Rotax 912 ULS? All the info I have seen usually calls for 91-93 oct. Don't know if this is due to fact that is the state (Fed?) gas station rating for cars, or is it because it is the min. for the 912 when referred to for our engines? I'd like to be certain as I don't want to use an octane that may detonate in the engine.
This issue becomes more important down the road as I hear that our omnipotent Gov/EPA is planning on boosting the ethanol from 10 to 15%, or maybe even 20% in the not too distant future. Interested in comments please, and thanks.
Dick Seiders