Quote:
Originally Posted by TheEnemy
My experience is a bit different, but I dont have much in the way of instrumentation so don't swear by it. When moving a few years ago we moved about 150 miles with about a 1000 foot climb in altitude. I would load up 1000lbs+ of stuff, and didn't notice a difference in FE, I'm pretty sure I would have noticed anything greater than a 1mpg loss, which would have been about 4%.
I was adding about 30% extra weight, which is about the same you added at 400lbs (guess). What % loss in FE is yours?
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From your description, it appears you are driving a big, heavy vehicle to begin with, seeing that you had 1000 lbs. in it. With larger, more fuel thirsty vehicles that have bigger engines, they tend to burn approximately the same amount of fuel whether empty or fully loaded. If there is any difference, it will be slight, or at least harder to discern.