AWD 2020 GT CX-30 ceramic coated
So considering the Mazda MX-5 recommends using 91 octane fuel or better.. and has the exact same compression ratio.. what makes it different then running our non turbo 2.5 skyactiv engines on say 89 or 91 octane fuel... same compression ratio 13-1 as the mx-5 but just a smaller engine and close to the same HP .. would there be any noticeable benefit? or just waste of money... I am trying to figure out what is different in the MX-5 weather its different tuned ECM software that always runs the engine at full capability on 91 ... The cx-30 is the same compression ratio so what gives with the different fuel recommendations... Would there be any difference with the cx-30 on more octane or is the ECM tuned differently and would be a waste of $$ on anything more then 87? I have yet to try it out in my cx-30 but wanted to see if anyone had a technical answer.