i crew on a small racing sailboat in the summer and i'm fanatical about weight there (the other 2 guys on the boat jokingly call me the "weight nazi"). i even leave my shoes behind when it's warm enough to go barefoot on deck.
i make them take out cushions, anchors, tools, extra sails, mop the bilge, the whole 9 yards.
the difference between winning and losing a race in light air can come down to a hundred extra pounds in a 2400 lbs boat. ironically, the owner/skipper is probably 75lbs overweight
i haven't thought much about weight reduction for my car yet, but probably will. i guess this is because i tend to focus on the hwy mpg figure, where weight reduction isn't as big a factor relative to sub/urban driving.
Took out 4 more pounds, rear speaker covers and center console, expect some serious stripping tomorrow.
You're taking out stuff I can't live without (ie, center console). You can always change your rear bumper supports to aluminum ones... although if you get rear ended your car (and maybe you) are done for.