I disagree with "Expect any time you change fuel grade to completely >re-tune." because it is such a definitive statement. There are times that >you can change fuel grade and never know the difference. >Mark Langford, Huntsville, AL +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I switch back and forth between 100LL and auto fuel (87 oct maybe, I'm not sure, it's the regular) in the Tripacer and the KR with an 0-200 and can't tell which I'm running. Unless of course you notice the 14 gal of 100LL I recently purchased at the airport for $38 would have cost me maybe $25 at the local service station. My climb rate seems to be better with a lighter wallet! :-) I've put 450 hours on the Tripacer in the past 5 years running at least 90 percent auto fuel and Marvel Mystery oil and have not had a single problem. If you have an airplane that sets for long periods the auto fuel seems to gum up the carb or so I've noticed on other aircraft. Just my non-scientific observation. Larry Flesner
