Honda 2003 ST1300lA Owner's Manual page 101

Engine Oil Filter
&
Other viscosities shown in the following chart may be used when the average
temperature in your riding area is within the indicated range.
JASO T 903 standard
The JASO T 903 standard is an index to choose engine oils for 4-stroke
motorcycle engines.
There are two classes: MA and MB.
Oil conforming to the standard has the following classification on the oil
container.
code number of the sales company of the oil
I
I
oil classification
PRODUCT MEETING JASO T 903
COMPANY GUARANTEEING THIS MA PERFORMANCE:
99
Servicing Your Honda