We have a 2004 Crescendo 36' with 330Hp Cat. We have put 4000 miles on it since we got it in early May. I get around 9 mpg consistently (towing or not). Some trips have been 70-75 mph, some 65-70 mph.
My highest was 10.0 mpg, my lowest 8.5 mpg. I have not been rigerous about speed to find "the sweet spot" for mileage. No problems in the Tenessee mountains.
Tim
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2004 36' Gulf Stream Crescendo 8356
Caterpillar 330 hp
Six speed Allison MD3000MH
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