Originally Posted by belizesailor
Yes, I've seen 90W gear
box oil routinely put into sail drives (both Yanmars and Volvos)..which I've always assumed was a bad idea due to the viscosity for most models. Right?
120SE specifically calls for synthetic 90W gear oil and the manual specifically says not to use motor
The 120SD calls for 15W40 motor
oil. Go figure.
I finally found the reference material (attached). Note that this was published before Volvo
changed the 130S recommendation from ATF to motor oil.