akmountaineer
New member
Is there any consensus on what type of fluid to run in an OC-12? The manual calls for Conoco DN-600 which is no longer available. Some appear to be running 5W-30 synthetic motor oil, some tractor hydraulic / transmission fluid, and others 80 - 90W gear oil. Obviously there's a huge difference between all of these, so what's the current line of thought?