RV Fuel Issues & Prices - Post 'Em Here!

Went to seek out the Costco supplier but to no avail. The best I did was the Corvette web site and its participants they all said for their investigations that Costco uses only the top suppliers and they vary as to who has the best price that day.
Other than that they also said that the EPA madates the additives and that in itself provides for quality fuel in todays markets.

I guess the bottom line to me is, if it's good enough for a Corvette then it's good enough for me!