The front of my RV and a bit of the side panels on my TV have some road tar on it.. the front of the 5er around the storage area has quite a bit of it.
I tried Turtle Was Bug n Tar remover.. not very successful.. Tried WD-40.. about the same results. Water and that purple cleaner don't really touch it.
I thought about diesel or ATF fluid.. but haven't gone there yet. Ah, yes.. also tried some Toluene or Acetone.. not sure which. Another thought might be paint thinner..
BUT, thought I'd check here to avoid possible issues..