I don't do jack to my 94 Disco besides fluid changes and clean the K$N. I have never in 10 years washed the engine or underside, I swear all the dirt and oil is holding the truck together. When it was under warrenty it was in the shop every month for some minor BS that was totaly cosmetic ie. rear lamp guards. Since it went out of warrenty there have been no major problems. I wheel it hard and it gets abused by my kids but the thing just keeps going ( knock on wood ). Things that have broken or need fixing but I choose to ignore are: clock light is out, passenger side door handle is sticky, back door only opens with a key, stereo backlight is out on half the stereo. Other than the irreparable desert pin striping down the side the thing looks and drives great.