Quote Originally Posted by gassersrule_196 View Post
i was just reading about this on another site make sure the 80/90 your using is GL-4 AND NOT GL-5 gl-5 is corrosive to the syncros
On the back of the oil container it says it meets or exceeds these
SAE 80W/90
API GL-5,MT-1
US MIL-PRF-2105F
Mack GO-H
So I'll go to the store tomorrow and look for some GL-4. And give that a go.
Are there any additives that would be recommended for a Muncie.