I've been running a .45 for about a year and a half now,
it still has the same plug in it that it came with. It's not
fussy on the needle, and has never quit in flight....except
for running out of fuel.

It's also the only engine I've ever had that exceded the
specs....it calls for 16,000 revs....mine turns 18,000.
I've never used anything but Powermaster 5% in it.