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JASO T903
The JASO T903 standard is an
index to select engine oils for 4-
stroke
motorcycle
engines. Motorcycle and ATV
engines
lubricate
transmission gears with engine
oil. JASO T903 specifies perfor-
mance requirements for motorcy-
cle
and
ATV
transmissions.
There are two classes, MA (MA1,
MA2) and MB. For example, the
oil container shows the classifica-
tion as follows.
1
Code number of oil sales company
2
Oil classification
and
ATV
clutch
and
clutches
and
2-5
Energy Conserving
Suzuki does not recommend the
use of "ENERGY CONSERVING"
or "RESOURCE CONSERVING"
oils. Some engine oils which have
an API classification of SH, SJ,
SL, SM or SN have an "ENERGY
CONSERVING" or "RESOURCE
CONSERVING" indication in the
API classification donut mark.
These oils can affect engine life
and clutch performance.
API SG, SH, SJ, SL, SM or SN
10W-40
Recommended
API SH, SJ, SL or SM
SAE
10W-40
Not recommended
SAE
API SN
SAE
10W-40
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