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SERVICE LIFE
In personal cars and light-duty trucks with non-turbocharged gasoline engines: change the oil at 35,000-mile or one-year intervals, whichever comes first.
In turbocharged gasoline engines and occasionally used gasoline engines: change the oil at intervals up to three times longer recommended by the engine manufacturer or six months, whichever comes first.
In high performance and racing engines: specified by Owner Experience/Oil Analysis.
Marine four-cycle gasoline engines and infrequently used automotive four-cycle gasoline engines: drain oil at intervals up to three times longer than those recommended by the engine manufacturer, or one year, whichever comes first.
In fleet and industrial engines: drain oil at intervals up to two times longer than recommended by the manufacturer, or six months, whichever comes first.
AMSOIL Oil Filters should be changed at 12,500-mile or six-month intervals (whichever comes first) in gasoline engines. If a Hastings or other filter is used, filter should be changed at manufacturer's recommendation