Spooler

That doesn't happen. The oil stays in the lines and dose not drain back to the oil pan. I have had a many a turbo car with oil coolers. I do fill up to just below the full line. When the car is shut off you won't see the level grow too much. It will grow some due to the oil draining back down from the heads. You will see the oil level go down in the sump tank on a dry sump car. I have to wait 5 min. after shutting the car off before checking the oil after it warms up to operating temp in my C7 Corvette Grandsport. It has a factory dry sump.