I have a Vegas 27.7 with the 4000 gen.
I filled my tank to the very tip top. I stated the gen. drove 5 mile. Keep the gen. on for 20 hours ran A/C and lived just like I was home. Drove back 5 mile and filled up again. It worked out to .521 gallons per hour. If gas cost $2.00 per gal. you are staying for an over night stay, say 12 hours it cost you $12.48. Less that a $35.00-$45.00 per night at an RV campground. Love the Gen.
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