My experience is that the cheapest gas in the orlando area are two places:
1. US 192 just off the Celebration exit from the Greenway, head east a little bit.
2. Semoran Blvd. just north of the airport there's a 7-11/Citgo just past Thrifty Car Rental that is usually pretty good.
Last year I used #1 for a good price. $1.379 in December 2000, and it was Racetrac.
Joe Hurley