Can fuel additive be added after the tank is full?
2 Answers
You can add fuel additive after filling up the gas tank, but the mixing effect may not be as good. The correct method is to add the fuel additive before refueling, allowing it to fully mix with the gasoline under the impact of the fuel flow, thereby achieving the best results. Here is some relevant information: 1. For turbocharged engines, long-term use can lead to significant carbon buildup. In such cases, using a fuel additive (cleaning type) is beneficial for the car. However, it does not mean you should use it continuously (once every 5,000 kilometers is sufficient), as excessive use can easily clog the catalytic converter. 2. There is another type of fuel additive that improves the anti-knock properties (octane rating) of the fuel, reducing the likelihood of engine knocking. However, prolonged use of this type can lead to increased carbon buildup and higher fuel consumption.
I used to wonder if fuel additives could still be added after the tank was full. My opinion is that it's best not to do so, as it could waste money and potentially pose safety risks. Fuel additives are gasoline additives used to clean engine carbon deposits or enhance performance. The instructions on the bottle usually say to add them into the fuel nozzle while refueling or to add the additive first before filling up with gas, ensuring thorough mixing. If you pour it into a full tank, the liquid can easily overflow, staining the car paint or even corroding surfaces, while also wasting the product and reducing its effectiveness due to insufficient mixing. I recommend adding a small amount when your tank is about a quarter full before your next refueling—this saves hassle and ensures better results. Developing this habit will also help your engine run more smoothly and prevent carbon buildup.
