What type of A/C oil does these trucks take? I've read a mixture of reports online and I'm having trouble finding it in the service manual. I believe I used Ester 100 oil years ago when I changed parts on it, but it doesn't look like anyone is recommending that for these trucks.

 

Pag oil 46 i believe, When i redid my ac i went to all the parts stores in the area and none of them had it. Had to use the closest thing i could find.