Do you mind explaing why you chose to change the oil so soon. Did the change oil light come on? Unless you constantly run it on ICE power it is much too soon to change the oil. In the 1,950 I drove it since I purchased it I am guess that I burned 0.05 gallons (less than a 1/10 of a gallon of gas) of gas since I got it. Even if you drive long distances and are utilizing the ICE more often changing the oil after only 6,000 miles seems like over kill.