I use a 200Ml bottle and put it in the tank and put 20 Litres of E10 in the tank, or you can use 100Ml bottle and put 10 Litres of fuel in Etc. Once this additive gets to work after a good run, you will have cleaned most of the internal gum and tarnish from the injectors and carbon from top of pistons, Once all this crap is blown out of the system I would recommend replacing the spark plugs with Iridium if you can afford it, the car will fire up and run a lot better regardless of Temperature, infact the colder the fuel the better the combustion in the engine. that's why they use intercoolers on diesel engines!
