Car And Driver just had an article concerning the quality of different gasoline's. A new program called Top Tier Gas.

http://toptiergas.com/

TOP TIER Gasoline Retailers:

TOP TIER Gasoline Retailers:

QuikTrip
Chevron
Sunoco
Phillips
76
Shell
Entec Stations
MFA Oil Company
Kwik Trip/Kwik Star
The Somerset Refinery, Inc.

Comments/opinions?