BTW. I think the ATF fire drill is a waste of time. Some people used to use ATF to clean crankcases, but modern engine oils have adequate cleaners. If the engine is so gunked up that you need to flush it out, use good oil, and drain it HOT, and preferrably overnight. The last drops that come out are the most sludgy. Change it every 500 or 1,000 miles until it is clean. If the sludge is so bad that it is part of your oil pressure problem, it's probably way too late to help.