Well, I got this 4Runner from my Dad who was wheeling it doing overland exploring in Montana and surrounding states up until he had a stroke at 76. I however am 42.
I'm 62, and I do all the wrenching on my 4Runner, and both my sons' cars, a '99 BMW e36 'vert and an '08 Hyundai Accent, as well as the 1966 Farmall 140 tractor I learned on.
I've done the timing belt and clutch, shocks and all maintenance on the 4Runner.