Viscosity:
Viscosity grade of engine oil should be based
on average atmospheric temperature in your
riding area. The following provides a guide to
the selection of the proper grade or viscosity
of oil to be used at various atmospheric
temperatures.
JASO T 903 standard
The JASO T 903 standard is an index for
engine oils for 4-stroke motorcycle engines.
There are two classes: MA and MB.
Oil conforming to the standard is labeled on
the oil container. For example, the following
label shows the MA classification.
(1) Code number of the sales company of the oil
(2) Oil classification
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