Quote:
Originally Posted by SDMCF
Have you been able to compare that with economy on similar trips without the extra weight? If so, how much improvement in economy do you think the weight makes? If not, what leads you to conclude that it is the weight rather than trip length or highway driving that makes the difference?
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Yes and no. I've done a lot of trips that are further than a single tank of fuel over a couple of decades and a bunch of vehicles. Fuel improvement seems to be about 10% better with a very full load. The full load does not happen often, but I consistently get my best milage on these long trips when packed full to the ceiling.