[2009Prius]

Originally Posted by ATaylorRacing

I use my 96 Geo 3 banger as a delivery truck. I usually carry from a min of 100 lbs to a max of 400 lbs. Over nearly 3 years I have found that every 100 lbs of extra wt in my car at the normal 60-65 mph costs me an extra one mpg.

Nothing beats hard data.