<strong>Yahoo Message Number: 87451</strong>Someone please tell me how I am suppose to use the "fresh oil on/off switch in my service bay in the back compartment of my 1998 affinity 40 ft coach, I have the 455 hp cat c-12. Do I fill the oil in the reservoir than turn the switch on to pump oil to the pan? what exactly is the purpose of this switch? thanks for any help. John