we used castor based oil in ur race car succesfully and that enigine was built but not built with any type of oil in mind.
the engine was actually a 1977 6cyl holden engine that had to be built to strict rules that basically made the thing stock other than head work witch was free and that it had to run avgas
i'd like to think the oil we used was better than the recomended oil back in 1977

