I generally use Flying J. Since this thread was started, we completed a round trip to Florida and back. We were using I95 for most of trip. Since many posters indicated they bought "cheaper gas" across the street from Flying J, we carefully checked the other stations' posted prices before pulling in for gas. During this trip, the best we found were that stations across the street matched the Flying J prices. Did not see any cheaper. If you have a Flying J discount card, you get another $0.03/gallon off the posted price making it cheaper than the others. Of course, other roads, geographic areas may have different prices/results.