How much better performance will i get with 91 octane compared to 87?

my car has an engine that has a compression ration of 10.5 to 1 and it says that it can support 87 because it has retard ignition but how much performance am i loosing. how much more performance will 91 give me?|||I know you%26#039;ll hear that if a vehicle was made to run on low octane then it%26#039;s OK to use low octane. In MY experience, I have learned the hard way that better gas usually means less car repairs. So what I am saying is: Do you want to pay more for gas? OR for more car repairs?





(tune-ups etc.)





If you don%26#039;t want your vehicle to start stalling, buy the better gas.|||It is not bad for your engine, but is a waste of your money.





The only difference between premium fuel and regular fuel is the octane rating. It has absolutely nothing to do with the quality of the fuel.





The octane rating is the fuel%26#039;s resistance to spontaneous combustion under compression. The higher the octane rating, the more compression it takes to make the fuel spontaneously combust.





A high compression engine requires higher octane fuel to prevent detonation. Detonation is a condition where the fuel air mixture ignites while being compressed before the spark plug fires. Detonation can cause serious internal damage to an engine.





Your car is well suited for 91 octane premium. But can run on 87 octane. You may lose some performance. But when was the last time you won or lost a race with this car? The little bit of performance loss would only be noticed when you are hard on the throttle. How oftern and how long do you drive at wide open throttle?





The higher octane fuel may make your car run a little better. But will do nothing to prevent any maintenance or make it last any longer. You will give the oil companies more money than you need to. I think they make enough money already.





The link below will tell you all about how gasoline works. The 4th page of the article explains octane.





I personally would run a couple of tanks of 87 octane. Keep a log of your fuel mileage. Average the results from your 87 octane tanks. Also keep track of the cost of each fill up. Then run a few tanks of 92 octane. Keep a log of the fuel mileage. Average the results. Again, keep track of the price of the fuel. Then figure out how much it costs per mile to drive with either fuel to see if you come out ahead.|||Higher octane is not %26quot;better gas.%26quot; It%26#039;s a slower burning gas to deter pre-ignition in high compression engines. Using it in an engine that is not high compression and was designed for use with 87 octane will result in unburned fuel residue that will collect on the valves and possibly in the top of the compression chambers. Use the fuel the manufacturer specifies.|||truth be told, there%26#039;s not really that much benefit from 91 octane save your money|||you will probably lose 5-10 horse power if you car was designed to run with 91 octane. even though your car can retard the timing on your car that does not mean you should use 87, you will notice the different in power and you might not like how it drives when you have to pass someone on the highway. dont use 87 because it is cheaper at this time other than paying 4 bucks for 91. the way your car was designed it was designed to run 91