The bottom of the oil pan.
The oil drain plug is located under the bottom of the engine to the right side of the oil pan. It requires a 14mm socket to rewmove it.
probably 5w-30
The correct tightening torque for a 1990 Honda Accord oil drain plug is 29 foot pounds. This same torque applies to all Honda oil drain plugs.
Drain plug on bottom of oil pan.
Bottom of the engine on the oil pan.
The oil capacity is 3.7 QTS
Remove oil pan for access
its in the pasenger side on the oil pan,
Screw it in clockwise.
17mm
3.5 Litres / 3.7 qt
12MM