Originally Posted by
98CoupeV6
I haven't noticed any difference in fuel economy related to octane rating.
It's possible that it's more related to a misrepresentation of the ethanol content.
I've noticed that 6MT gas mileage is highly dependant on the driver...
The secondary intake opens at 4000 and it comes on the cam at 5000.
You can accelerate fairly briskly and still get good gas mileage as long as you're shifting below 4000.