Burn rate of 2004 390 Dancer (Gas and Diesel)

jmunro123

Member
Feb 2, 2008
370
Gran Bend, Great Lakes
Boat Info
2004 Sea Ray 390 Motor Yacht
Engines
8.1's
I was wondering what the burn rate difference is between the Gas and Diesel on the 2004 Sundancer 390 with the Cummins vs 8.1's. I am trying to figure out the Breakeven to move to diesel. We boat on lake huron and travel about 400 - 500 miles each summer. My guess is the diesel's are not worth the premium. So the questions is:

1. what is the cruising speed and burn rate for a 2004 390 Dancer with 8.1's?

2. 1. what is the cruising speed and burn rate for a 2004 390 Dancer with Cummins?

I have heard that diesels burn between 20% and 30% less fuel? Is that about right? If it is then I can calulate the price to operate each boat.

Also, it seem like diesel are about $40,000 more on this vintage of boat. After another 5 years however the premium seems to go away and the diesels are closer in value to the gassers. Do you agree with that?
 

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