AM PM Arco Gas Station

Review: I purchased gas from Arco, Tracy, CA two weeks apart with two different cars (June 25, 2015 and July 8, 2015). Both cars immediately suffered performance issues, the first immediately, 2005 Porsche Cayenne with no apparent previous problems, stopped before getting 12 feet out of the station lot; and the second car, 1999 Saab 9-3 Turbo, barely made it home. This is too much of a coincidence. I would like to know if that station is degrading the gas quality and if there were any other complaints of damage to automobiles. I have a car totally out of commission and one with questionable reliability which I believe is due to bad gas from this Arco station. Please contact me to further this conversation. Thank you,Desired Settlement: I am demanding complete repair of both automobiles to include, tow to accredited dealership service center and whatever cost incurred to bring the cars back into good operational condition. I would like an immediate resolution.