oil filler cap

I know this is an old thread so this might not even matter now. If you have stuck rings you might be able to unstick them by just driving the car. I had a car that had been parked for about 2 years. When I got it running I had to drive it about 150 miles to where I was living. It burned over a quart of oil in the first 50 to 80 miles & then it was fine after that. I think the rings had been stuck & the driving loosened them up.

Ask me how I unstuck a clutch disk that had stuck to the flywheel on the same car.