Can this longtime market-beating winner keep skyrocketing?Five years ago, who would've guessed that O'Reilly Automotive (ORLY 0.04%) would be one of the market's big winners? But its share price is up roughly 240% since then on a split-adjusted basis, crushing the S&P 500's five-year return of 106%.How did O'Reilly do it? Well, besides having one of the catchiest jingles out there ("Oh, Oh, Oh, O'Reillyyyyyyyy...!"), the company has been rapidly opening new stores and buying back stock. Its shares just spli ...