80/90 for the diff
75/90 for the t-case
I see some are using Mobil 1 gear oil 75/90 in diff's. Could there be a problem using 75/90 in the diff's? Mobil 1 75/90 flows like water and 80/90 is a lot thicker.
I use Mobil 1 75/90 in t-case.
Amsoil 80/90 in the diff's.
I was thinking of using Rotella T 5w40 snthetic oil but it is summer and the 5w is borderline for WI temp.If I was in AZ the Rotella tech said 5w is to low. I will wait till fall and use it. Rotella is a diesel but works for autos too. I use Mobil1 10w30 but should go to a 10w40 for summer. With 220,000 mi maybe I should have 50 for summer???
kurt
75/90 for the t-case
I see some are using Mobil 1 gear oil 75/90 in diff's. Could there be a problem using 75/90 in the diff's? Mobil 1 75/90 flows like water and 80/90 is a lot thicker.
I use Mobil 1 75/90 in t-case.
Amsoil 80/90 in the diff's.
I was thinking of using Rotella T 5w40 snthetic oil but it is summer and the 5w is borderline for WI temp.If I was in AZ the Rotella tech said 5w is to low. I will wait till fall and use it. Rotella is a diesel but works for autos too. I use Mobil1 10w30 but should go to a 10w40 for summer. With 220,000 mi maybe I should have 50 for summer???
kurt