if your motor is not pinging, leave the octane alone. to make the most power, you want the lowest octane that doesn't make the motor ping!!!
octane=harder to burn
Exactly right....regular has more energy per gallon than premium......engines that need premium generally have other power increasers...high compression, timing, fuel and others....unless the engine is tuned to run premium you are wasting $$$ and maybe even loosing power.......Torrie can do a rather mean 100 octane tune....made a big difference in my truck...