As Cletus stated, there will be no added performance benifit from adding 93Oct. to your car(without the proper tune for it).. With that said, there is always the added benifit of your car running cleaner as there is less garbage(even better if you run something like Chevron with Techron as it is a cleaner that will help remove and help keep down the sludge build-up the cheaper stuff can cause) to cause you problems down the road [img]graemlins/5.gif[/img]
Here in Europe we fill our cars up with octane 95...no prob!
Caprice Freak:Your 95 number doesn't correspond to the same scale as North America. (You could also run lower octane than you are in that Caprice with no problem or loss of performance, as low as a RON of 91 or so...)
Here is an explanation:
In the United States, pump octane is an average of 2 ratings, research octane (RON) and motor octane (MON). If you look at any gas pump in the United States, you will see a yellow sticker that says "octane by R + M / 2" That is the basic formula for an average. These 2 numbers mean different things. You could make an analogy to that of a blood pressure reading (systolic and diastolic). Research Octane number is always higher than Motor Octane number.
In Europe, they only report the RON. You may hear people discussing that in Europe, the octane is higher. Well, that is not exactly true. You see, in Europe, you might find 96 octane at a local gas station. (wow 96, highest we have here is 94). Well, that 96 is equivalent to 92 here in the States.
Let's start with some basic information about octane rating. The term octane is a familiar one and it's important to follow the recommendation that your vehicle's manufacturer specifies in the owner's manual. That number is actually an average of two different octane numbers (Motor Octane, or MON, and Research Octane, RON). These refer to the fuel's ability to resist "knock" (fuel igniting before the ignition spark and resulting in a "flame front") under different driving conditions. MON affects knock at high engine speeds or loads, RON at low ones.