Alam ko usually 90 grade ang ginagamit sa mga sasakyan. It can be used for differentials and trannys.

We have 2 diesel-fed engines here, and usually sa umaga pag bagong andar ang makina hirap ipasok sa 2nd gear. Do you think it is safe to put 140 grade para mas malapot at baka sakaling mas madali na ipasok ang kambyo?

Another question is from the 4WD aspect. Ganun din ang circumstance early morning drives may naririnig akong sound coming from the front solid diffs. Safe ba gamitin ang 140 grade na lapot sa may mga diff lockers?