Due to its unique formulation, using "too much" Fuel Doctor (i.e., using more than the recommended shock or maintenance treatment) will not harm your engine or fuel system. In fact, Steve from Fuel Doctors™ suggests that using a little more is far more beneficial than using a little less.
Fuel Doctor Fuel Conditioner can be used with all petrol and diesel fuels, with absolutely no detrimental effects to the associated engines or fuel systems. In fact, the manufacturers, Fuel Doctors™, have never seen any adverse effects from using Fuel Doctor with other fuels such as two-stroke, E10, E85, Methanol, and Avgas. And it's perfectly [...]
Fuel Doctor only treats the fuel you put it in, so when you buy more fuel, you are potentially introducing a new batch of dirty fuel into your system. Using the recommended maintenance treatment of Fuel Doctor every time you add fuel prevents the unwanted and costly side effects of putting dirty fuel through your [...]
Fuel Doctor Fuel Conditioner can be used in any vehicles or machinery that run on diesel, petrol, or two-stroke fuel. Anything from commercial bus fleets, massive mining machinery, and super-yachts to personal watercraft, household mowers, and chainsaws.
For cars, trucks, and busses, the recommended "shock treatment" of Fuel Doctor is: 500ml per 100L (max) fuel tank. Vehicles with an excess of 100,00kms should shock treat two or three tanks, prior to moving on to maintenance treatments. For example, if you have a 72L fuel tank and your car has travelled under 200,000kms, [...]