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Old 05-07-2024, 10:31 PM   #181
Bud
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Best mileage is about 35-40 mph, worse is anything north of that.
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Old 05-07-2024, 10:51 PM   #182
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In mileage discussions, it would be nice to know the speeds for the quoted MPG amounts.


We can get anywhere from 14 to over 17 with our 07, near max load Roadtrek 190P on a Chevy with a 6.0L engine. Assuming similar wind conditions as we need to do is go 50mph our up to 75+mph.


One tankful is mot really useful information for mileage in many cases as fill volumes and pump shutoffs vary to much, IMO, as do wind conditions and routes. If you go from 10k elevation to 5K on any given tank you will probably get quite good mileage even if it is roller coaster type road.


We keep track of mileage on a full trip bases, by not resetting the Scangauge (which is carefully calibrated to our use over many miles) over the entire trip and then filling at the same pump when we get home. Usually in the 20-K miles, sometime less and sometimes up to 7K. That includes all driving on the trip so all the slow, traffic, campground, city, country etc is included. On that basis we pretty consistently get about 14.5mpg per trip and we drive about 72mph on the freeways, so not trying for high mileage.


Many/most factory speedo/odo information is about 2-3% high from what I have seen, so that will reduce your actual mileage calc if you know how much it actually is and factor it in. Our Chevy was off by about 3% and that turns 15mpg into 14.5mpg. I have a tuner so I was able to recalibrate the odometer to read nearly right on, except for tire wear over time. Speed is also now very close on the speedo.
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