Sasa and Alan.
Just to prove how good this engine is.........I filled up yesterday and put a total of 16 1/2 gallons of red diesel in at a cost of about £23.
That equated to just over 17 hours of boating.
This was a combination of slow (4-8 knot and about 4 miles or so) through harbour restrictions and anything up to 30 knots out on the big stuff. Weather has generally been 3-5 with some big stuff over the Chichester Bar.
If I had filled up with petrol that would have cost about £71
Even with the extra cost of purchasing a diesel over a petrol engine, when you look at these figures it would pay for itself in no time at all.