Thanks to all who partipate in this lovely discussion as probably everybody has some experience with this.My question was prompted by newly purchased additive at Canadian Tire ,labeled as Valvoline Diesel Fuel Treatment.It is one litre volume bottle and on the direction label it is stated that it treats 1200 liters of fuel,what means ratio of dilution 1: 1200,which seems strange.That means approximately 60ml per tank,or one quarter of cup per one fill up.
I am afraid that that is wrong direction.
There is no indication what is part of that.What do you think?