Have you got rusty lug nuts that just don't want to come off?
I just watched a video showing a trick I've never heard of before.
Use something like a cigarette lighter (or small butane BBQ lighter) to heat the lug nut and stud. While warming them rub a standard candle on the stud allowing the wax to flow onto the stud and nut.
Now just use your lug wrench and remove the nut. The video showed them removing several lug nuts with only moderate force after being unable to budge them before the wax.
I've not tried this so good luck.