Chris_Top_Her
Contributor
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- San Antonio, Texas
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- '15 CX-5 Miata AWD
higher octane (93) is more likely to maintain nominal power under adverse combustion conditions(and allow more aggressive timing, with less knock count).. in basics. Not sure about the 110, although the reasoning is the same, this engine doesn't rev high enough for me to want to buy that in a N/A engine.What's your reasoning for using the 93 octane at every fill up and the 110 octane after an oil change?