Spurred on by the Arab oil embargo and the demands of The Energy Policy and Conservation Act, automotive engineers in the past few years have improved fuel economy by cutting down the weight of cars, designing lean-burning, "stratified-charge" engines and developing electronic ignition systems that fire spark plugs at precisely the right time in the engine cycle. Last week the Ford Motor Co. revealed that it had developed still another way of saving gas. Ford President Lee lacocca announced that within two years, his company will offer six-cylinder vans and light trucks equipped...
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