Quote:
Originally Posted by wagonman76
Ive been wondering that about my Celebrity. I took at least 150 lbs out of the trunk, and still got 32 mpg going downstate and back, just like before. I notice that the back end sits up a little higher now since the springs are not as compressed, and maybe that added wind profile offsets the weight decrease. Some cheap lowering clips on the rear springs might tell the tale of whats really going on.
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Changing weight makes comparatively little difference on highway FE (relative to city). If you're running stop and go traffic, or running up inclines, then extra weight will make a significant difference.
Also, in your case, that 150 lbs. is likely only 5% or so of the total weight. That may have improved things but you'd need to average a number of tanks to see that subtle a difference.