Suzuki LT-F400 Owner's Manual page 12

JASO T903
The JASO T903 standard is an index
to select engine oils for 4-stroke
motorcycle and ATV engines. Motor-
cycle and ATV engines lubricate
clutch and transmission gears with
engine oil. JASO T903 specifies per-
formance requirements for motorcy-
cle and ATV
transmissions.
There are two classes, MA and MB.
The oil container shows the classifica-
tion as follows.
1
Code number of oil sales company
2
Oil classification
Energy Conserving
Suzuki does not recommend the use
of "ENERGY CONSERVING" oils.
Some engine oils which have an API
classification of SH or higher have an
"ENERGY CONSERVING" indication
in the API classification doughnut
mark. These oils can affect engine life
and clutch performance.
SAE
10W-40
Not recommended
clutches and
SAE
10W-40
Recommended
1-3
DIFFERENTIAL GEAR OIL
Use a SAE 90 hypoid gear oil which is
rated GL-5 under the API classifica-
tion system. If you normally operate
the vehicle where ambient tempera-
ture is below 0°C (32°F), use a SAE
80 hypoid gear oil.