BUSINESS MEMO: NEW CREDIT `GIZMO'

A gasoline marketer that helped pave the way for motorists to pay at the pump with a credit card has a new device that should speed visits to its gas stations while letting customers leave the card at home.

Mobil Corp. said Wednesday it plans to introduce an electronic gizmo that can be clipped to a key chain and uses radio signals that activates the gas pump and charges the purchase with a single swipe past the pump.

The Mobil Speedpass eliminates the need to fumble through a purse or wallet for a credit card or cash and to wait for credit authorization. The program will start in May in these nine markets: Boston-Rhode Island-New Hampshire, Chicago, Detroit, Los Angeles, Miami, Orlando, San Diego, Tampa and Washington, D.C.