For years, auto-parts retailers and distributors have benefited from economic, technological and consumer trends that have kept cars on the road longer and heightened demand for parts and service.

Carvana (CVNA) shares were up on Monday after the used-car retailer was added to the S&P 500 (SP500). The stock is up about 14% so far today. In light of this event, Seeking Alpha took a look at the ...