:banghead: Unless you are running a higher compression engine or the mfg requires it, you will get more power out of using the correct octane.. Most people have it backwords thanks to brainwashing by gas companies trying to make more money.. Higher octane gas burns more slowly than lower octane - Higher octane by itself will not give you more power in an engine that only requires 87, it's going to burn slower in those engines and have less power. The correct lower octane will burn faster and give you more power. the only reason to run higher octane is if the engine pings on the lower due to the gas igniting too soon - if you havn't put a supercharger or turbo or something else to modify the engine, and it still pings on the spec'd octane, then there is something else wrong with your egine, like carbon build up, timing, etc. In fact if you run a high octane fuel in an engine built for lower octane you will increase the carbon and junk build up becasue the engine isn't burning the fuel fast enough to burn it all. Modern computer controled engines can compensate a bit, but you will still get more carbon, etc.. One of the myths is that people run high octane in a low octane engine for a long time, then one day they try switching back and either lose power or ping - and say the engine runs better on the high octane they have been using.. this is from either the computer not having time to recalibrate the timing to the faster burning gas, or the carbon build up and heat from running the high octane, or both..
Bottom line is - if it's spec'd for 87, run 87. you will get the most power, cleanest burn, less build up and deposits, and lowest emmsions. Only run higher octane if you need to due to engine design or high performance modifications. Otherwise you are just tossing free money to the gas companies, and may in the long run be harming the engine..
Everybody can feel free to paypal me the extra money they waste on unneeded high octane gas instead, I'll put it to better use than the stupid gas companies..
[email protected] 