GM to Put New Oil System on Most Cars

General Motors Corp. said it plans to make a computerized oil-quality monitoring system, now available on some high-end GM cars, standard equipment on 90% of its North American cars and light trucks during the next five years. The system, first developed in Europe, monitors engine revolutions, operating temperature and other factors to determine when a vehicle’s oil should be changed. GM executives at the Specialty Equipment Manufacturers show in Las Vegas said the system could extend the period between oil changes and thus could save as much as 40 million quarts of oil annually by eliminating unnecessary oil changes. GM shares gained $2 to close at $65.19 on the NYSE.