And that's Honolulu. I just filled up at a Chevron station a few days ago. Regular: $3.19 per Gal.
Hopefully you don't have far to drive.
I wonder if a solar powered car would actually make sense in Hawaii. You seem to get enough sun shine and in your case I suspect the price has a lot to do with the shipping costs. IIRC Hawaii does not have a refinery and so your gas must be shipped to you ready to go.