Do you keep your skid plates all the time or you take them off ( fuel tank) when not off roading. With my off roaring and all extra weight during daily driving I am replacing lower control arm bushing every 24,000 miles.
Back when I was young... (until 3-4 years ago), I used to drop the Tactical fuel tank plate on the floor of my garage between off-roading trips and park the car right on top of it, it's about 100 lbs and I am sure it makes a little bit of a difference at stoplights and the fuel pump. Then again, a few years before that (with my Sport), I used to take off the Compos and put the 21" bling-o-rama staggered wheels back on as well after an off-roading adventure. I even washed and waxed my car for a whole Sunday sometimes, crazy stuff!!!
Now, I just don't care anymore. I proudly drive around with California pinstriping on doors and fenders, fully ready to go off-road at a moment's notice, fuel economy and road noise be damned. The considerable time, hassle and wear and tear on my back and joints required to take that sucker up and down just aren't an acceptable trade-off for bloat, fuel economy and wear and tear on the car anymore. And once you add various skid plates and rock sliders under your car, the stock wheels and racing slicks start looking dinky anyway. As you and your kids (if you have any to drive around to all types of activities) get older, priorities change I guess... They did for me, lol. I have only replaced LCA bushings (the last time I changed the entire control arms, actually) twice in 172K miles, so I don't think removing that fuel tank would have made much of a difference - I did replace the regular bushings with poly bushings when I got the new arms about 90K miles ago though, so that may have made a difference in their longevity. Or maybe I am just luckier than you, but I ain't taking that thing down no more.