Workhorse 8.1 liter poor fuel mileage
I have a 2005 Fleetwood Southwind 37c with the 8100 Vortec V8 with an Allison 5 speed transmission with 28000 miles that gets very poor gas mileage, about 6 mpg towing my boat or pickup and 7 mpg empt...
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WE had an '04 Southwind 36E towing a Rav4. We crossed the country 8 round trips and drove to Alaska. Total mileage was 110,000. This was over 8 years on a well maintained Vortec 8.1 L with the ally 5 spd. I logged every gallon of fuel purchased and mileage at fillup. The long term average mpg was 6.5. The first 3 or 4 years we drove the speed limit as fast as 70. The rest of the time we agreed to limit our speed to 63 regardless of any higher limit.
DW and I share the driving equally, if I had to bet she got 7 and I got 6 mpg, she has a lighter foot and I am more likely to stick my foot in it when i want to accelerate. Nonetheless the average is taken over 110,000 miles in all conditions. On good days I might see as much as 8 and headwinds heading uphill all day it might be as poor as 6. As they say YMMV
DW and I share the driving equally, if I had to bet she got 7 and I got 6 mpg, she has a lighter foot and I am more likely to stick my foot in it when i want to accelerate. Nonetheless the average is taken over 110,000 miles in all conditions. On good days I might see as much as 8 and headwinds heading uphill all day it might be as poor as 6. As they say YMMV
