Originally Posted by 50r

WOW!! it works. my whole gas tank is clean&free from rust.its all gone,and looks brand new inside.
i poured 7.L of coke into my zb50 tank. $1.47 for 2.L
one of cokes ingredients Sulfuric acid(battery acid) did the job well.
i saved my self alot of money and i would recommend it to anyone how needs to get rid of surface rust.i dont recommend drinking coke anymore.
ill put up some pics soon