Charon wrote on 08/13/12 at 11:53:44: There were both Suzuki and Kawasaki branded 10W-40 conventional oils, and both claimed to meet both MA and MA-2 specs.
I wonder what that means?
MA didn't really say much about ZDDP, it said the clutch shouldn't slip during a specified series of tests and it shouldn't have more than a certain, lower amount of sulfur.
Now MA-2 says less ZDDP and even less sulphur and according to BITOG you can drift out of weight grade during some of the testing and that is OK with MA-2 oils.
Come on, you can't be MA and MA-2 at the same time, the amounts allowed and the test procedures are different.
If you were whacked in the head you might try to say ANY TRUE MA-2 OIL has less than the MA sulfur level (true) and less than the MA ZDDP level (true) and it does pass a MA wet clutch test and MA standard doesn't actually say anything about dropping out of weight grade (the old assumption was this was a bad thing for any oil to do, btw, but it wasn't a stated rule per se)
Here is a source to help you dope through it all, but I can say is I think it is IMPOSSIBLE to really meet MA and MA2 at the same time with the same oil. They are in conflict on some items.
http://www.motorcycleanchor.com/motorcycle/how_to/mc_oil.htmlSomebody is just "chaining specs" like they do with the API sf/sg/sh type nonsense.
"MA-2" in the joint MA/MA-2 would rule if you use the API rules, but JASO isn't API based at all -- completely separate form of testing.
What does it
really mean?