See also:

Condensation under the parked vehicle
When using the automatic climate control, condensation water develops that exits underneath the vehicle. Therefore, traces of condensed water under the vehicle are normal. ...

Remove attached parts following use
Remove auxiliary mirrors, roof or rear luggage racks which are no longer required following use. Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption. ...

Fuel specifications
Never use fuels labeled at the fuel pump as metal-containing. Do not use leaded gasoline or gasoline with metal-containing additives such as manganese or iron; doing so can cause permanent damag ...