I was changing my oil last night for the first time since buying my truck. I noticed that when I removed the old oil filter, virtually no oil drained out. I'm guessing that could be because the way the filter is positioned....since the truck had been sitting for a few hours, maybe the oil drained out? Which leads me to believe that the POS filter that the non-Toyota dealer put on for the last change may not have had an anti-drainback valve. Do you think this is the case or is there some concern not having any oil draining from the filter?
I used a Toyota OEM filter for my change after reading some reviews on here.