Chevyman3 said:
From the way things look im thinking the new 2006 si is going to need 91 or higher fuel to run properly? I hope im wrong as I would rather see the compression dropped alittle and sacrifice a few hp so I could run regular unleaded. I built a couple motorcycle motors and come to the conclusion the 1 point in compression ratio just doesn't add up to much more performance just higher fuel bills. On a side note I been driveing a 2000 civic ex since new and find it to be a great car. My only disapointment is I didn't opt for the si version.
I hear ya. I wish I knew what it would run on, but right now it's a mystery. If it follows the trend of the RSX and the RSX type S - it will require premium. The RSX-S runs off premium gas vs. regular gas in the base RSX. It was anounced that it will use the K series motor, so it's going to basically be a brother of the RSX engine most likely.
Think of it this way - the cost difference might not be THAT much worse.
Let's just say you'd get 20mpg for a year on 20k miles ave. - just easy number to work with.
So that would be 1000 gallons of gas at that rate. We'll just say 87 grade is 2.00 a gallon, and premium is 2.20 a gallon.
at regular - you'd spend $2000 for the year.
at premium - you'd spend $2200 for the year.
If you drove 20k miles, and got that gas mileage, at that price of gas - it would be about 200 bucks a year difference. Yes it does add up over time, but you'd basically be paying about 2 dollars extra per fillup (give or take).
I guess we'll all see soon. I bet most people won't even think of it though when they go to buy it.