I use a scraper on all my SB. I like the idea of having a barrier to separate the oil in the pan and the potential of being whipped up and aerated. I need to keep a stock depth oil pan and at 7K thru the traps exposes the oil to whipping. I have not found any evidence of this on the dipstick but believe that it exists and oil in the air not making it to the sump,pump and motor. Am I assuming too much?