yar i have been looking for this thing since 6 months, its not available any where in islamabad and most of the people dont know about it.
then finally i went to shell service station f-7 markaz. they put some soda by carb diesel patrol and oil on engine and leave it for like 15 minutes and then wash it with surf. (VERY GENTLY). and the engine gives a brand new look.
they charged me extra 150 for this process.