Hey guys. I have an unfortunate update. The oil light came back on yesterday!
After about 20 minutes of driving, close to home, the oil light came back on while idling in gear at a stop light. I noted sub-5psi pressure on the gauge.
I got it home and immediately drained and replaced the oil and filter while it was still hot. Then I started it, and it was back to 50psi at high idle. Idled it for about 15 minutes and put it in gear with the wheels chocked and it was at about 25psi at the lower idle speed.
Ok, so I thought maybe I was good. But later in the day, it happened again. I drove the car about 20 minutes to go run an errand and right around when I was reaching my destination, the light started to flicker. By the time I parked, the light was fully on and the mechanical gauge showed little if any pressure at all! I ran my errand, and about an hour later, got back to the car, started it, and my pressure was back! Then after 20 minutes more driving, the pressure went away again and I parked at home.
Hopefully I didn't wipe my bearings during these 2 escapades. Regardless, I want to try a more thorough Flush using the "soup" Slant Six Dan describes. Dan—you say to use Kroil, ATF, MMO, and Chemtool B12. It is hard for me to find Kroil—can I use another penetrating oil?