Biodiesel also rates well in terms of "energy return on energy invested" (EROEI), a subject of much recent concern. In fact, biodiesel generates an average 3.2 units of energy for every unit of energy spent in its production. This, and its great potential for further improvement, suggests that the government and public should continue to support its development.
至於各界最關心的能源「產出／投入比（能源產出量除以生產過程投入的能源量，以免出現產出 1 公升生質燃料需耗費 2 公升石油的荒謬現象）」，各種作物提煉的生質柴油都是正數（約 1 ~ 3.2），發展潛力佳，值得政府和民間繼續支持。