I don't think it is even dyed red in Guernsey, it certainly isn't from Boatworks in St Peter Port. Even with our tiddly sailboat amounts it will pretty well all be Channel Islands purchased after November with any other topups in France.
Not sure abouit consumption, guessing at about 2 miles ish to the gallon. Will have a better idea whan I next fill up as I now know that all the tanks are full.
It will be interesting to see what it works out at. I saw figures for 2 similar boats in the USA quoting 4gph (but US gallons) at 8kts, one with Ford Lehmans the other with 3208 Cats. What would have been more interesting would be the figs at 7kts, ie a bit more below hull speed, the extra knot is probably very expensive?