Hi Tom,
Today, Tuesday, Sept 6, 2005, the average price in Hawaii is $3.01. One gas station is selling Regular unleaded for $3.17 per gallon.
As you may or may not already know, Hawaii has become the first state in the U.S. to set limits on wholesale gasoline prices. The state Public Utilities Commission is setting the wholesale price ceiling for gasoline in Honolulu at just under $2.16 a gallon. The law doesn't put a cap on retail prices.
The State Public Utilities Commission had suggested the cap could actually increase the price of gasoline.
Gas prices in Hawaii are the highest in the country, but they could be falling dramatically as a result of the law.

(personally not sure about that one...

)
If Hawaii's two refineries charge the maximum the cap allows, a gallon of regular at the pump next week with taxes and dealer mark up, prices could soar to at least $3.15.
The governor has written to Chevron and Tesoro asking them not to push their wholesale prices to the maximum allowed.
"My point in writing is the gas that they are going to be selling was refined from oil that they purchased long before this hurricane occurred," Gov. Linda Lingle said.
Chevron would not say if it plans to charge the maximum allowed and Tesoro said it needs to review the governor's request.
Info provided by:
http://www.thehawaiichannel.com/money/4922941/detail.html
You can also find a Price Per Fill Up Gas Calculator on this site...just enter in your tank size and the state you're from....