All Eaton Superchargers use Nye 605 (I think it's 605) Synthetic oil. It is very expensive but very effective. Its specs can be found on Nye's website. This is coming from a former Eaton Co-op who worked at their Marshall, MI proving grounds for 1.5 years. Good luck finding any Nye outside of Magnusson or another blower but I wouldn't recommed the latter. You need to figure out exactly how much your blower came with originally as well. 10-15 cc's too much or too little can quickly build up enough heat to destroy a unit. Good luck with your search. Nate.