"Two Cycle Gasoline Engine Oil Performance Classification(JASO M345:2024) was revised on March 2024, in order to correspond to the termination of manufacture and maintenance of the testing apparatus for exhaust smoke of JASO M342.
We would like to inform you that the JASO engine oil standard implementation panel revised the on-file standard implementation manual according to the revision of "JASO M345:2024".

Concerning details, please confirm a revision manual(2T_2025_EV2505.pdf).

We would like to inform you that the JASO engine oil standard implementation panel revised the on-file standard implementation manual according to the revision of "Two Cycle Gasoline Engine Oil Performance Classification(JASO M345:2018) ".

Concerning details, please confirm a revision manual(2T_2018_EV1912.pdf).

We would like to inform you that the JASO engine oil standard implementation panel revised the on-file standard implementation manual.

The test number of the test method(ASTM) was changed as follows.
-Elemental analysis-
(Ca-P)：
 ASTM D 4951 → ASTM D 4951 or D5185
(Sulfur) :
 ASTM D 2622 or ASTM D 5185 → ASTM D 2622 or D4951 or D 5185

We would like to inform you that the JASO engine oil standard implementation panel revised the on-file standard implementation manual.

The points of the revision are as follows.
(1) Taking over of the company code by a merger or brand succession will be accepted.
(2) The test number of the test method(ASTM, JIS and JPI) was adjusted with the newest standard.
Density (15℃)：
 JIS K 2249 → JIS K 2249-1 or JIS K 2249-2
 ASTM D1298 → ASTM D1298 or ASTM D4052
Flash point：
 JIS K 2265 → JIS K 2265-3 or JIS K 2265-4
Carbon residue ：
 JIS K 2270 → JIS K 2270-1 or JIS K 2270-2
 ASTM D 189 → ASTM D 189 or ASTM D 4530
Elemental analysis
(Ca-P)：
 JPI-5S-38-92 → JPI-5S-38
 ASTM D 4951 → ASTM D 5185
(Nitrogen) :
 JIS K 2609-1990 → JIS K 2609
(Sulfur) :
 JIS K 2541-1992 → JPI-5S-38 or JIS K 2541-5 or JIS K 2541-7
 ASTM D 2622 → ASTM D 2622 or ASTM D 5185