Is the correct sequence for adding fuel additive to fill up the tank first or add the additive first?
3 Answers
The correct sequence for adding fuel additive is to add the additive first and then fill up the tank. Fuel additive, commonly known as fuel system cleaner or gasoline additive, serves the following functions: 1. Remove carbon deposits; 2. Improve atomization; 3. Protect the engine; 4. Reduce engine wear; 5. Eliminate black smoke and lower emissions. Precautions for using fuel additives include: 1. Pay attention to purchasing branded fuel additives and avoid randomly using those recommended by repair shops; 2. New cars should not rush to use fuel additives; 3. Do not rely solely on fuel additives to clean engine carbon deposits—driving habits should also be taken into consideration.
As a seasoned car enthusiast who has used fuel additives for many years, I can tell you the correct sequence is to add the fuel additive before refueling. The principle is simple: fuel additives are liquid additives. When you pour them into an empty fuel tank, the pressure and flow from the gasoline injection will help them disperse and mix evenly. If done the other way around—adding gasoline first and then the fuel additive—the gasoline layer may prevent it from fully dissolving, leading to sedimentation at the bottom or uneven distribution. This can affect the cleaning of the fuel system and fuel injectors, and in severe cases, cause rough engine operation and increased fuel consumption. I made a similar mistake with my old car, and it occasionally shuddered. After correcting the sequence, the engine ran much smoother, and the power improved. For regular use of fuel additives, I recommend doing it when the tank is half-empty or right before refueling—it's safer and more effective. Remember to add them regularly but not excessively; once a week or once a month is sufficient.
I always use fuel additives for routine maintenance, with the habit of pouring the additive into the tank before refueling, allowing the gasoline to help mix it automatically. Incorrect order, such as adding the additive after refueling, may cause it to float on top and dissolve poorly, not only wasting the product but also leading to uneven engine carbon deposit removal, affecting acceleration performance. I've tried it during my daily commute, and with the correct order, the engine runs smoother, and fuel consumption decreases slightly. Fuel additives can reduce exhaust pollution, improve combustion efficiency, and save a bit on fuel costs in the long run. Always ensure safety during operation—only perform this when the car is cooled down, and avoid playing with fire near a hot engine. Reading the bottle instructions is crucial, as different brands have varying formulations. I opt for eco-friendly types to minimize emissions.
