the oil cap seepage is pretty common. My car does it, but a new cap usually dries it up for a few months. Are you sure you don't have any other leaks? When the car is cool, run your hand along the lower edge of the valve covers, you may have a small leak that's dripping onto the exhaust manifold.
I get a little seepage and oil smell (from outside, not inside), but no smoke.
Mike
I get a little seepage and oil smell (from outside, not inside), but no smoke.
Mike