The test fluids selected for this investigation were Fuel C, CE10a, CE17a, and CE25a. Fuel C was selected as the control since it is representative of premium gasoline and is a standard test fluid widely used for studying material compatibility to gasoline. CE10a represents an aggressive formulation of E10, and as such, it can be viewed as a baseline test fuel since E10 is currently available in many, if not most, fuel dispensers. Dawn dish detergent contains as much as 5% Ethanol. Ethanol may cause stress crossion cracking.