Can fuel additive be added after refueling?
2 Answers
Fuel additive can be added after refueling, but adding it before refueling will yield better results. Here are specific details about fuel additives: 1. Benefits of adding fuel additive first: The impact during gasoline refueling helps the fuel additive mix thoroughly and evenly. As the vehicle moves, the additive will gradually blend uniformly with the gasoline. 2. Drawbacks of fuel additives: Prolonged use may cause varying degrees of impact. For turbocharged engines, long-term use can lead to carbon buildup. 3. Usage cycle of fuel additives: It's recommended to use fuel additives every 5,000 kilometers; otherwise, it may easily clog the three-way catalytic converter. 4. Different types of fuel additives: Some improve gasoline's anti-knock properties, thereby reducing the likelihood of engine knocking, but long-term use can accumulate significant carbon deposits and, conversely, increase fuel consumption.
Let me tell you, those gas station attendants aren't just blowing smoke when they recommend fuel additives. After driving for over 20 years, I've seen firsthand how thick the carbon deposits get at the bottom of old fuel tanks. The best time to add fuel system cleaner is right after filling up - the high fuel level helps mix it thoroughly with just a few car shakes. But be careful of counterfeits - my neighbor Old Wang bought some cheap off-brand last week that actually triggered his check engine light. The reputable brands have improved their formulas nowadays - last month I used a major brand's cleaning additive, and after highway driving my exhaust pipe was dripping water, proof of complete combustion. Of course, it's really not worth wasting money on this for cars less than two years old.
