Gas station consumers have become increasingly conscious of expanding choices and service options available at retail outlets. The purpose of this study was to determine key factors in customer choice of gas / service stations. This study seeks to identify key the relationship between socio-demographical variables and consumer choice, and consumer satisfaction and loyalty associated with gas / service station usage. The research instrument comprised of a questionnaire in the form of an on-line survey that was administered during November, 2010. A Total of 1,000 questionnaires were used in the final analysis. The collected data were treated with SPSS Windows 18.0 and analyzed in for frequency, percentage, mean, standard deviation, pearson's correlation analysis, and multiple regression analysis. The results of were as following: First, there was a strong positive relationship between involvement, satisfaction, loyalty of gas station service. Second, satisfaction was significantly affected by involvement, the frequency of gasoline purchases, the information route and customer's occupation. Third, loyalty was significantly affected by consumer satisfaction, involvement, frequency of gasoline purchases, information route and customer's occupation.