I lost 10% of my weight in that time frame, by accident and by not exercising. I'm trying to gain it back.
I agree with RH77 saying weight reduction doesn't matter much. It doesn't really, unless the vehicle is going to have a proportional reduction in engine size. If a manufacturer reduces weight, they will keep the same powerful engine so the brochure can boast of faster quarter mile times, because we all run the quarter mile sprint as we take Johnny to daycare.
The consumer tends to demand higher performance over fuel efficiency. Consumers will have to change their priorities for manufacturers to do anything meaningful with weight reduction.
You'll know we're headed in the right direction when you see more commercials touting efficiency or environmentalism than "Zoom, Zoom". I don't watch commercials, so let me know when this happens, please.