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Message: [QUOTE="nossliw, post: 1008909, member: 10001"] 17.8-19.2 daily driving and hand calced, mainly hwy at 65-70mph. Believe it or not using a fuel addy does make a difference for me at elevation.... i didn't believe it at first. Towing 12-14,000 lbs in an enclosed gooseneck sail I see 11-13mpg at the the same altitude... Daily elevation change is typically 5,000-7,600 feet daily... goes to about 9mpg when I pull 70 over Eisenhower and Vail with that weight...but that's 5,000 up to 11,000 and 4th and 3rd gear only... [/QUOTE]

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