雜誌中對於合成油的部份描述如下 :
The synthetic lubricant used for the all of these fuel blends is Polyalkylene glycol, the relatively inexpensive UCON oil. There are a multitude of other synthetics that are available including polypropylene glycol, poly esters, and polyol esters, but they are much more expensive. Fortunately, as confirmed by several lubricant experts, when castor oil is mixed with almost any synthetic, a superior lubricant is produced.
樓上的大大們己有分享 , 可參考