Convenience-store chain ampm is finding success using sports sponsorships to showcase its product offerings, promote its brand personality and engage on-the-go Millennials.The unit of BP America, Inc. and franchisor of close to 1,000 locations in Arizona, California, Nevada, Oregon and Washington kicked off the sponsorship push in 2015 with the Los Angeles Dodgers and a branded store in Dodger Stadium.Pleased with the success of the partnership, ampm this year expanded the sports marketing push ...