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Message: <blockquote data-quote="Fireuz" data-source="post: 517183" data-attributes="member: 15565">If you understand my statement, yes, I admit that the the higher Ron will provide the higher compression of fuel air mixture. But as bro B33mEr told us, the loss of power between this two Rons is very little (on normal city driving). Why would fuel company need to add special additive to Ron 97 and not Ron 95? Reason simple, for most car they don't feel the difference so this is bad for marketing. So might as well add extra additive to enhance the power. So you feel the difference in power most probably from the extra additive which Ron 95 do not have, not because of difference in Ron. But, this is clearly depends on what type of car you're driving (turbo or n/a), the compression situation, and some other reasons.Back to the ques, I mix both two because I'm using my car in high compression mode most of the time which I need the addictive to improve my compression in my combustion system (long distance drive). But for the normal city driving, I will fill up my tank full with Ron95 for sure, or Ron93 if there's any..:30:</blockquote>