It depends on whether or not your house is visible in google earth. This is how the insurance company tracks your car so that they can see whether or not it was stolen.
There are exceptions to this but normally the car rental firms insurance covers the the car, if in doubt always get CDW when renting a car (Collision Damage Waver)if you have OPCF 27 on your car...
Pan gasket, pump seal or detent/dipstick "o" rings likely culprits. Clean with carb cleaner or similar & see where it is coming from. If you change pan gasket, might as well change fluid/filter.