i have a small container to use to incubate bearded dragon eggs but i‘m not to sure if potting soil is the right thing to use
If you can find a naturally composted potting soil, that would be fine. Regular ones have fertilizers that can be harmful. Miracle Grow has a naturally composted potting soil out now that has no additives. Also, you could go to your pet store and get a material. It's really in-expensive and won't hold excessive moisture like soil would.
Well, an oil leak can do that. So check the valve cover gaskets first.
No. Many include to many extra ingredients. Go to the pet store and buy the bricks of hard soil. Put 1 or 2 in a very large pail or pan, they get big. Keep them slightly moist but not on the eggs. Good luck.
I would not use potting soil. I have incubated and hatched several species of reptiles. I use vermiculite. I get it from Orchard Supply, but any garden supply store should have it, and its cheap. Get it moist, but not wet enough to squeeze water out of it. You can either use a vented container, and mist the eggs and vermiculite every so often as needed, or use an airtight container, and open it every 2-3 days for a few seconds to exchange air. I have done both ways, but prefer the second, as I have been able to incubate eggs for 2 months without adding moisture (other than the original moisture I added), and they hatched fine. I put the eggs on the vermiculite, about halfway buried. Remeber not to rotate the eggs from the position they were laid.