Jeff: I use 100LL in my C-90 because the warranty from the recent engine rebuild forbids the use of other than AVgas. I add TCP at each fill-up to get rid of the excess lead and the plugs seem to stay clean. Another unfortunate expense.
You can buy the mogas STC. What you mainly have to avoid is alcohol in the mogas and that is pretty tough to do in some areas of the country. Alcohol attacks seals, the sloshing compound in the tanks, cork float sealants, and is forbidden by the STC. There are tests for alcohol. If you don't use the plane very often, mogas will also form sludge in the tanks, but AVgas will will remain "fresh" for a long time. David Alon A2 #A35 N6359V ====================================================== At 08:20 PM 9/2/98 -0500, Jeff Orear wrote: > Hello Coupers: Now that we have all the fuel leaks fixed, and the >Carbheat works, I'm a happy couper. Enlighten me, Oh Couper-gurus! Regards, Jeff Orear >N93966
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