Irish Rover
Well-known member
My engines are rated for max 3,800 rpm and my boat has a max speed of 24 knots. I think most users would see 2,600 rpm giving 16/18 knots as a reasonable cruising speed which would give you a range of around 4,000 miles between the recommended service intervals of 250 hours. I rarely run my engines above 1300/1400 rpm which gives me a speed around 8 knots and a range of around 2,000 miles between services. I know all the guff about diesel engines needing to be worked hard, but my wife's X Trail still has the same kilometre travelled service interval, regardless of how she drives it. So is there an argument (YBW loves an argument) for me servicing less often?