|
actually, you wont notice ANY increase in performance OR gas milage by using a higher gas grade in the G20 (unless you are advancing your timing for performance, which would require better fuel).
higher octane gasoline is more resistant to combustion. since combustion is a slow process (it takes up to 60 times longer than an explosion), it's quite possible that you wont end up burning every drop of fuel if you put premium into an engine that is tuned for 87. that may be what you heard about decreased performance with higher octanes. then again, it would probably be so subtle you wouldnt notice.
i havent confirmed that you can lose performance by using a higher than necessary grade of gasoline, but i have confirmed that it does not... COULD NOT... help either gas milage or performance. keep in mind that all the additives they put in premium, they put in plus and regular, too.
even if you dont agree with the above statement, you would have to be a FOOL to believe that putting premium gas will improve the gas milage of your car to the point where it offsets the extra cost.
i'd say that's just my $0.02... but it isnt - those are facts.
|