A cray boat (big aluminium planing hull) I do data collection aboard every year replaced the last of a series of Volvo donks with a Scania a couple of years ago.
They generally fish the same places and approx number of days every year, so they know fuel consumption......... which went from 37 l/hr to 24.
Has a bit more poke too......... I could feel the difference when it was put in gear and taking off to pull the next pot.
DL

