Re: 90 wt mineral oil

Posted by Owen_Dyneto On 2011/7/27 7:10:50

Just go ask for SAE 90 gear oil, grade GL-1. Common and easily available and pretty much a match for the original lube. It's essentially mineral gear oil with a defoamer added.

That said, many Packard owners use SAE 90-140 EP gear oil (same as you might use in the differential) in the transmission and OD.