when I first started at an oil company as a diesel tech I was tag teaming an oil service on a petrerbilt with ac15 cat engine with the operations managers son. he pulled the plug while I changed fuel air and coolant filters. I asked him if he installed the plug and he responded with a yes so I set my overhead oil pump to 48 quarts and let her eat. after it stopped pumping I pulled the dipstiock to find no oil. looked under the rig ( had a service pit) and found our sliding oil pan was literally filled to the brim and the oil was dome shaped almost overflowing.. whoops