As far as cars are concerned, hearsay is many times more prevalent than the manufacturers’ own advice. One such case is the change of the engine’s oil: most car owners believe that 3,000 miles (5,000 km) is the appropriate mileage for an oil change.
This might have been true a few decades ago when engines needed extra care, but technology has moved on since then.
Nevertheless, despite the fact that almost all new vehicle manuals advise owners to change oil in their cars every 7,500 to 10,000 miles, studies show that a great number of drivers prefer to do things their own way.
"The 3,000-mile oil change just says that the marketing campaign by quick-lube companies has been effective", Steve Mazor, manager of the Auto Club of Southern California's Automotive Research Center, told the Detroit News.
