First, many thanks to PlatyPius and CCrew for the information they provided to me on a previous post. I downloaded the Service Manual for the 2001 Magnum R Shock (thanks CCrew). I checked the oil level and it's low. I want to add oil to see how the shock will perform. The manual calls for "SAE 5WT Maxima Fork Oil or equivalent". So I'm guessing any 5WT shock oil will do. What about a non-detergent automotive oil, will that work?
I've inquired about obtaining a rebuild kit and was advised that Manitou does not support this fork anymore. Besides, I'm putting this on a low budget bike and want to control costs so I've decided to just add the oil and see how it performs and if it leaks see how bad the leaks are. So for now, a rebuild is not in the picture.
Any help with what oil will work is very much appreciated.