ʻOiai ʻo ia wale nō ka "ontology structure", ʻo ka thermal efficiency o 51.09% e ʻike mau ai ka poʻe i ka wā e hiki mai ana o nā mīkini diesel. Inā ʻaʻole no nā kumu ʻelua o ka hoʻokuʻu kalapona a me ka mālama ʻana i ka ikehu hoʻolālā diesel, pono e loaʻa i nā mīkini diesel kahi manaʻo maikaʻi loa. ʻO ka hana wela ke ana o ka ikaika o ka hana. ʻO ke kiʻekiʻe o ka wela wela, ʻoi aku ka nui o ka hana. He ʻokoʻa loa ka hana ʻana o kahi ʻenekini me ka wela wela o 35% a me ka hana wela o 45%.

ʻO ka maikaʻi wela o nā ʻenekini gasoline i kēia manawa ma kahi o 40% wale nō, a ʻo ka hana wela wela i ka wā ma mua he 35% wale nō. I nā makahiki i hala iho nei, ua hoʻomaikaʻi maikaʻi ka hoʻopukapuka ikaika i ka noiʻi a me ka hoʻomohala ʻana i ka hana wela, akā ʻaʻole maikaʻi ka hana.

Ma muli o ka maikaʻi o ka hoʻolālā, hana ʻia nā ʻenekini diesel i ka hoʻopau piha ʻana ma o ka hoʻoulu ʻana i ka hoʻopili ʻana, a ʻo nā hiʻohiʻona o ka homogeneous combustion e hoʻonui i ka puhi ʻana. No laila, ʻoi aku ka maikaʻi o ka wela o nā kaʻa wahie he 5% -10% kiʻekiʻe ma mua o nā mīkini ʻaila.