I purchased this plane last fall. The previous owner rus the engine with 1 part 100LL and 3 parts 87-OCt. I live in a Village (Yakutat, AK) that only has 87OCT. Does anyone out there run a combination and or any other type of additive?
Thanks,
Dave
I purchased this plane last fall. The previous owner rus the engine with 1 part 100LL and 3 parts 87-OCt. I live in a Village (Yakutat, AK) that only has 87OCT. Does anyone out there run a combination and or any other type of additive?
Thanks,
Dave
use the 87 oct should be fine. even put in the alki fuel if the tanks can take it. I use 91 in my 100. when I had the 80 I used the 87. I use the alki fuel in my 100 because it's 60cents less doesn't run any different.
Last edited by Slyfox; 06-04-2014 at 11:24 AM.
I can only get 87 in non-ethanol, so that is what I use. Seems to work fine as I have done it for several years. My airport is as 4,500' MSL.
Steve Wilson
Huntsville, UT
Kitfox 85DD
912A / 3 Blade Taper Tip Warp Drive
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Dave , I only use the alc free gas in my 912ul . interested in why the prev owner used a mix . I've never heard of any advantage to using the avgas , especially since you pay a penalty for using 100ll in times between oil changes and spark plugs .
suppose you don't have too many gas stations up there so maybe you can't get alc free gas .
chuck
kitfox IV 1050
912ul warpdrive
flying B , yelm, wa
The only reason I would think is to add some stability to the fuel. Auto gas is junk. It's not stable for more than a couple weeks. Avgas is stable for years.
I run non-contaminated 92 octane gas in my plane because I know how fast the octane levels deplete with time. I was told that vented fuel will loose several points of octane over just a week or two.
Could be stability or his 87 octane was really crap and he was experiencing knock or trying to avoid knock. The 80hp 912 requires 87 octane (90 RON) min, all the other 912's and 914 require 91 min (95 RON).
I do agree octane can reduce when exposed to the atmosphere, but have not heard anyone report several point in a short period of time. Most I have heard of is a point or 2 over more than 3 months. Your mileage may vary (literally) .
Greg