info on useing fuel flush cleaner
 

when do you mix it in with fuel ?

dos it smoke loads ?

how long does it take to work ?

Generally I stick it in when there is a 1/4 of a tank(or less)of fuel,then top the fuel up to the max.It shouldn`t smoke loads,as for how long it takes to work well only you can be the judge of when the car feels a bit smoother tbh they don`t do a lot mate.