Thanks for starting the thread. Over time with additional technical expertise and good data it will improve. I've got a friend that's a retired merchant marine engineer. He was a electrical engineering professor at the marine union's engineering school. I'll see him next month and ask him for some leads for good fuel consumption data. The ships he took me on were huge. Engine rooms looked more like a warehouse. Pistons the size of 55 gallon drums. Oil had to be heated first before it could flow.