10w30 in mower gearbox?

Joined
Jan 2, 2004
Messages
10,013
Location
California
Another oil worth considering is a motorcycle oil. I found one that is API SJ.

Would the wet clutch additives be something to avoid though?
I wouldn’t sweat the wet clutch friendliness of JASO MA(and Allison C4) rated oils. Honda for years called for 10W-30 API SH/SG/SJ/SL oils for their motorcycles and car gearboxes until friction modifiers were introduced with the API SM/ILSAC GF-5 specs.
 

dlundblad

Thread starter
Joined
Sep 30, 2013
Messages
15,252
Location
Indiana
I wouldn’t sweat the wet clutch friendliness of JASO MA(and Allison C4) rated oils. Honda for years called for 10W-30 API SH/SG/SJ/SL oils for their motorcycles and car gearboxes until friction modifiers were introduced with the API SM/ILSAC GF-5 specs.
And I guess to be fair then, API SJ oil is just that. If it wasn’t, it wouldn’t be called that.
 
Top