Materials Added To Fuel
All gasoline sold in the United States is required to contain effective detergent additives. Use of additional detergents or other additives are not needed under normal conditions and would result in additional cost.
Therefore you should not have to add anything to the fuel.
See also:
Winter Operation
Use of the air Recirculation mode during winter months is not recommended because
it may cause window fogging. ...
To Vary The Speed Setting
When the Electronic Speed Control is set, you can increase
speed by pushing the RES (+) button. If the button
is continually pressed, the set speed will continue to
increase until the button is ...
Models Without Express Window Feature
Press the mirror select button marked L (left) or R (right)
and then press one of the four arrow buttons to move the
mirror in the direction the arrow is pointing. ...