when I had the oil pan gasket leak, it was a quick leak, but even then I didn't see any on the ground. These pan gaskets are like 2 gaskets. Sounds like a strong possibility. If your engine was burning 2 qts in 2 days, you would definately smell it and see some smoke coming out of your tail pipe. Get it checked as soon as you can. Don't want your engine to overheat and warp the heads or something.