Good gas mileage- - - - -but what's the piston mileage on one running that lean? You're right on the ragged edge of destructive detonation, especially if the ignition timing is advanced just a tiny bit above optimum. Gasoline is cheaper than engine parts!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!