"Every air-cooled Porsche, everywhere in the world should shut off its engine for 30 seconds today, out of respect for Joe ...

The 63rd edition of Daytona's annual sports-car race, the Rolex 24, begins Saturday afternoon at 1:40 and makes 24 full laps of the clock.

Here are today's top 10 largest car companies by market capitalization, as electrification takes center stage.