Hi All, Anyone with experience regarding the fuel consumption on a Hatteras 70ft from 1979's? I'm interested in what people see as the most economical RPM speed and what corresponding fuel burn they have seen? i'm thinking in the 850 RPM range. Better yet, does anyone have fuel charts for this boat and the DD12v71? A few other technical questions: 1. If you have a 70ft Hatteras from this time how big are each of your fuel tanks and what type of manual way do you have to check the tank level? One I'm looking at, i found some sticks in the engine compartment which are clearly to measure tank levels but i cant figure out how to get in to them. Looking at a longer off shore passage with this and need to understand the limitations. Again, i'm not after speed but economy.