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What oil goes in a 1981 Honda 400?

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Wiki User
2008-03-20 20:14:40

Use an SE or SF type oil within the range of 5W-30 to 20W-50.

(The lower the number, the better the engine will start in cold

climates.) A 10W-40 has a constant viscosity and will perform

efficiently across a wide range of engine operating conditions.

Higher numbers are usually recommended for engine running in hot

weather conditions. For more complete information, download the

manual. You can download the entire repair and service manual from

hondatech.info in Adobe Acrobat PDF format at:

http://downloads.hondatech.info/Moto/CB/CB400/Honda%20Cb400%20Cb450%20Cm400%20Cm450%20Twins%20Nighthawk%20%281978-1987%29%20-%20Service%20Manual%20400%20Pag%28Eng%29.pdf


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