National Geographic : 1967 Nov
General Motors ispeople making better products for people. Jim Rennell is murder on motors. For your protection. You would never dream of car up a mountain all day. Pull- for production. To make sure doing the things to your car that ing a heavily loaded trailer, they'll take anything you can Jim Rennell does to his engines. It's only one of dozens of ever throw at them. It's another Like running them wide open 29 grueling tests skilled techni- way we protect your investment hours straight on a dynamom- cians, like Jim, throw at GM en- in each Chevrolet, Pontiac, Olds eter. Which is like driving your gines before they're approved mobile, Buick or Cadillac car. Jim Rennell, Dynamometer Operator, General Motors Engineering Staff, Warren, Michigan.