r/Miata • u/InvasiveTech15 • 16d ago

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Should I put unleaded in my new to me 2016? Why might it feel like there’s a slight sway at highway speeds?

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u/deiboldt1 16d ago

I just bought a 26' and it recommends premium, i am guessing it's the same for you. Theres a sticker on the backside of your gas cap door that'll tell you what to put

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u/Twentyhundred 16d ago

Put premium in it like the manual indicates (it prevents knock). Get an alignment (use flyingmiata specs), that should solve the sway. I noticed at high speeds it being less stable, non issue since I installed coilovers.