Originally Posted by
h22accord
These engines have knock sensors that will detect detonation or knock/pinging and will instantly retard timing to compensate. The end result is a slight reduction on power, and increased fuel consumption.
So... What's the point? I agree that if you accidently filled up with 87 octane, that it's not the end of the world. Just revert back to the proper gasoline as soon as possible. But why would you intentionaly do this? The end cost of gas per tank is probably a whole $2.50 - $4.00 more depending on local prices. Add the increased consumption to the cost of the 87 octane and the difference minimal.
I bet the chances of a lead foot & resulting "ping" are alot more likley than driving like granny. After all, why would anybody buy an S2000 if they were concerned about spending a bit more on gas? If you want something econimical, buy a hybrid. If you want a sports car, learn to accept the costs that come with it. I hope you aren't trying to skimp on maintnence like this!