All slow-speed and medium-speed diesel engines, on the other hand, are operated on heavy fuel, the world market price of which is only about 60 % of that of diesel oil.
Kwakunye neeinjini zeedizeli ezinesatya esicothayo nezinesantya ezikhawulezayo, ngamanye amaxesha, zisetyenziswa kwipetroyile ezinzima, ixabiso lelizwe lezoshishino elimalunga namashumi amathandathu eepesenti zale oyile yedizili.