1999 Buick Lesabre Oil light came on after starting in cold

The car was sitting for 6 days, the last 3 were at -37C. I didn't have it plugged in, I have an 800 CCA battery. In the evening I started the car with a remote starter from the house with no problem. It ran for 8 minutes and I shut it off. If it didn't start I would have plugged it in.
The next morning I started it with the remote starter and it ran for about 5 minutes before I got in. The oil light was on and then I remembered that the motor was running a little rough. I stopped the car and checked the oil. It was at the top of the cross hatch area, meaning just right. I got back in and it started with no problem. I drove it with the oil light on and the Check Engine Light was not on. The car stalled about 6 blocks later. It now doesn't want to start, even when boosted. It didn't seem like it would take a charge. The lights are all bright until I try to start it.