Originally Posted By: Eddie
What does HONDA recommend?
API classification
SG or higher except oils labeled as energy conserving on the circular API service label
viscosity (weight)
SAE 10W-30
JASO T 903 standard
MA
* suggested oil
Pro Honda GN4 4-stroke oil (USA & Canada), or Honda 4-stroke oil (Canada only), or an equivalent motorcycle oil.
* Suggested oils are equal in performance to SJ oils that are not labeled as energy conserving on the circular API service label.
They do have a chart allowing 10W-40 at higher ambient temp averages.