What oil should I use in my aircraft engine? Why? How often should I change it? What about all the advertised additives? Why not automotive oil?
Technical Editor:
Believe it or not, a truly comprehensive answer to this question was too large to put it in the Q&A section. Please view the Articles category in the Downloads page, and view or download the Oil article. Please let me know if you find it helpful, or if you still have questions.