I had a tool to help push the piston back in and it wasn't too difficult. Im not sure what seized would look like. I used the silicone grease that came with the autorock package.
Update! After driving about a thousand miles, I can confirm that the car does burn oil.
It's interesting that you use half a can every oil change. The website says 1 oz for each quart and run it for 100-300 miles.
Yeah, that one's easy and cheap.According to the estimate it is the no. 2 engine mount that needs to be replaced.