I guess the problem solver in me asks "what would it take to make the KR impervious to any gas station fuel?" after all, our cars engines, some of which are very complex, can run on gas from any gas station.
aluminum fuel tank would seem to solve it that far. fuel lines should be easy to solve as well. theres whatever carb (or efi) u running. and also the running characteristics themselves. would the crappy (relative to extinction-risky avgas) fuel vapor lock or do something else bad when running it? these are all legitimate questions which could lead to an affordable and available fuel for our planes, if the risks are mitigated. On Mon, Dec 22, 2025 at 4:14 PM Larry Flesner via KRnet < [email protected]> wrote: > > On 12/22/2025 2:23 PM, Kayak via KRnet wrote: > > this is interesting and scary. my own goal would be to be able to run auto > fuel reliably. IF possible. but at this point since I have no kit nor > plans to build, just an academic question. "back in the day" I had a > Grumman AA1 with auto fuel STC and it worked fine, AvGas was $1.93 and car > gas was $1.35. but that was before this stupid ethanol travesty started. > :) > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > And summer and winter blends and California only blends and, as Jeff Scott > found out the hard way, all the different unknown additives that different > suppliers put in their mix. There are probably a number of auto fuel > suppliers that sell a compatible product but "consistent dependability" is > hard to come by in today's market. Is doing a time test on every 5 gallon > jug of fuel worth the dollar savings? Does every airport selling "auto > fuel" do a "time test" on every batch of auto fuel or simply the standard > daily test for water / impurities? And, even airports that sell a good mix > of "auto fuel" probably sell limited quantities in relation to their tank > volume. How long has that last delivery set in their tanks and has the > quality held over time? > > As always, YRMV..................... > > Larry Flesner > -- > KRnet mailing list > [email protected] > https://list.krnet.org/mailman/listinfo/krnet >
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