4 cyl accord..... gas don't really matter.. if you have high performance car, then yes. it does make difference. my friend just got 350z, and the dealer actually told him to put supreme gas to get it's max power.

if you read the car manual book, they say regular gas 87 is good for you. Don't waste your money on supreme! save your money for new car! =)

but if I had to answer your question.. yes it does boost a little bit..
but it's 4cy accord.... lol how fast could it get? so it's your choice...
I would stick with regular for now