long time lurker, first time poster. I work as a service advisor in a dodge dealership and found tsb #08-013-08 REV. A does not apply to the 2008 dodge ram 5.7. as I can find. and the oil change interval is just not to exceed 6000 miles or 6 months. per Chrysler the oil should be changed within 500 miles of the "oil change required" notice coming on in the vehicles cluster. the vehicle will learn from your driving style, idle times, outside temperature, acceleration rates etc and adjust your oil change interval as it sees fit. but to the original question, key to run position, 3 times down on the gas pedal and key off will reset it.