The replacement of the oil in the mechanical Chevrolet Cobalt is as follows:
(1) Install a car on a yam or an overpass.
(2) Remove the protection of the engine.
(3) Substitue a capacity of approximately 2 litres under the carter box.
(4) With the square key "on 9.5" (you can also use the box with square 3/8 `) unplug the cork.
(5) Sour oil.
6) Finish the cork back.
(7) The key shall be placed on the bottom of the cap.
(8) Using a syringe, pour new oil to the lower edge of the control hole.
9) Finish the cork and put the engine in place.