If you have 100% gasoline, the cruise will like about 14.7 which is stoich.
That is, without a doubt, the most incorrect and oft repeated myth ever.
The stochiometric ratio is nothing more than when exactly all oxygen is consumed and all fuel burned.
You can and should go leaner than that at cruise for mileage. You will be richer than that at WOT for safety. There is a very narrow band where stochiometric ratio matters and unless you are running cats it's irrelevant. You tune for what the engine wants, not some number someone who doesn't understand it's meaning tells you.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
