Hello, Just did my first oil change at 6,329 miles. I got out about 4.5 qts of used oil. I had the truck on a level surface. I replaced oil filter as well. Filled it with 6 qts. I've never done a first oil change before. It would make sense if some of the oil burned off or got absorbed into the dry machine parts. I was wondering if anybody else experienced the same. Is 25% oil consumption from factory to first change @ 6k an expected amount?