Consumers Guide to Gasoline
More Harmful
Avoid When PossibleLess Harmful
Relatively Speaking
ExxonMobil
Shell
BP
Chevron
Valero
ConocoPhillips
Getty/Lukoil
Marathon
Tesoro
FinaCitgo
Sunoco
Hess
Flying J
Murphy
Gulf
Sinclair
Irving
Keystone/Kwik Fil/Red Apple
Giant Mustang
Cenex
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