I was at a Shell station one day and saw their blurb about their new VPower gas (93 octane) and I made this little joke in my head about "VPower for VTEC!", anyways, I only fill up my car, so I bought a tank of it and although it very well could've been psychosamatic I thought the car ran a little better, I didn't notice any mpg increase. I did the math, and I can spare the extra $5/wk it would take to power my car with 93/VPower, so I began to use it more and more (I exclusively use it now) and my MPG has gone way up, by about 50mpt. I'm NOT kidding. This is about my 8th full tank of it since I started doing this and I used to get about 330-340 a tank, at the last fillup I had gone 385 and my gas light had JUST come on (I usually drive for 20-30 miles after the gas light comes on, I still have ~2gallons left because the manual says 17.1 and when I fill up I have to squeeze $30 even in it which is usually about 15 gallons.) I could've easily gone 420 without being made to fill up.

It's just a random observation. The blurb at Shell said VPower is suppose to clean the FI.