There is always small amounts of oil on the pavement wherever I park.
There is an oil leak somewhere in the engine. Where could this be coming from? on 2003 Nissan 350Z
Need to look from underneath vechicle above where the spot is on pavement. Usual culprit is the oil pan gasket has gone bad and needs replaced. You can try a oil stop leak additive temporarily till you get the problem fixed. Be sure to monitor your oil level often and check the oil pan gasket soon.