Re: Oil weights

Posted by Ken_P On 2023/8/25 12:50:17

Just to add my experiences:

I have lived in Florida, upstate NY, and coastal VA with my 120. I've used Rotella 15W-40 in all those conditions with no issues.

On transmission, I saw SIGNIFICANT driveability improvements when I drained whatever the PO had in the transmission and shifted to the Napa GL-1. It was honestly like I rebuilt it. Every shift was smoother and quieter. What came out of the transmission was gear oil, and not overly black, so it appeared to have been in decent shape, but the shift to GL-1 was very noticeable.