I have 100 miles round trip to Big M, at about 13 MPG, so that's about 8 gallons, I don't do a lot of running around on the big motor, and keep it around 4,000 RPM, so I will usually burn about 4-5 gallons in the 200 Merc. So about 13 gallons total. Boat gas is non-ethanol so a bit more, so it's probably $50 for fuel and oil. I usually make the trip to Big M once, and sometimes twice a week.