Scorpio Tankers was one of the earliest and most prolific adopters of exhaust-gas scrubbers to reduce carbon emissions, but it has had enough.

The New York-listed company revealed in its fourth-quarter earnings report that it has taken a $10.5m write-off on previously incurred costs related to installing the devices on 11 of its product tankers.

The vessels will remain scrubber-free, leaving the equipment installed on 86 of the 111 tankers operating in its fleet.