A small amount of fuel stabilizer allows gasoline to remain viable for more than six months in storage. Starting will be easier and engines run better on gasoline that has not deteriorated.

Pushed to achieve government-mandated fuel efficiency gains, car designers increasingly turn to small-displacement, turbocharged engines. Almost everyone's doing it.

Safety regulators widened their probe of more than 97,000 Volkswagen AG diesel vehicles after receiving reports that appeared to link engine problems with a failure of the vehicles' fuel pumps.