oil in tank ???

[invisyblegypsey]

Dawn dish soap and a brush. this is what is widely used in the oilfeild for cleanups

 

[CHOMPERS]

well its just the tank i have no filter or anything on it. the guy didnt tell me what kind of oil it was but he was working on a car so im guessing ,motor oil

Ok, that clears it up. If it is still full, put some dish soap in it and let it set for a while (an hour or so). Then drain it, wipe it down with paper towels, and then rinse it. During the rinse, make sure there isn't any more residue. If there is, go nuts with the dish soap around the silicone and tank lid.

 

[kagami]

I agree on brake fluid cleaning up almost anything it dries super fast though because of the alcohol in it, but I wouldn't recommend using it on a tank.

 

[Nyquil Junkie]

Not brake fluid, brake cleaner.
lol

It does evaporate quickly and leaves no residue or oil behind, thats why we use it to degrease brake parts.

I'd be more concerned what it does to the silicone.

I'll second the dawn dish soap idea.