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Piston Slap: Knockin' on Stoichiometry's Door?

TTAC Commentator dastanley writes:

Hi Sajeev,

I have a Piston Slap question: Most of the gasoline sold here in New Mexico is high altitude gas, meaning that Regular is 86 octane, Midgrade is 88, and Premium is 91. The owner’s manuals for my ’06 Corolla and my wife’s ’08 Hyundai Tucson (try not to be jealous :-) ), calls for 87 octane fuel. Am I OK to use Regular or should I take the manuals at face value and pay a dime more per gallon for Plus?

Sajeev Mehta Dec 26, 2019

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Piston Slap: Knockin' on Stoichiometry's Door?

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