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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) Oil code
(2) Oil classification
37K28B31.book Page 67 Monday, July 26, 2021 6:11 PM
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