Hyundai kicked off its summer-long Gas Lock promotion yesterday with some PR high-jinks. Via Twitter (and radio spots), the Korean carmaker revealed the location of gas stations in Queens, NY, Chicago, and Los Angeles where for a few hours, folks could purchase regular old 87-octane gas for $1.49/gallon. ...

Twitter is definitely becoming a way that carmakers reach consumers. Expect that to continue as the industry landscape is remade over the next few years.