When Should Fuel Additives Be Added?

[VanSavannah]

Fuel additives should be added before refueling. Fuel additives are categorized into cleaning type, maintenance type, and performance-enhancing type. Both cleaning and maintenance types contain cleaning agents in their chemical composition, which can effectively clean or inhibit carbon deposits in the engine, addressing issues such as insufficient power and fault codes caused by fuel quality. The functions of fuel additives include: 1. Removing carbon deposits and cleaning the fuel system; 2. Enhancing power; 3. Saving fuel; 4. Anti-corrosion, rust prevention, lubrication, and noise reduction; 5. Cleaning carbon deposits and gum from the engine intake and fuel injectors; 6. Anti-corrosion agents, anti-knock agents, and combustion improvers provide anti-corrosion, anti-knock, and improved combustion effects.

[DelCamilla]

Having driven for over a decade, I believe the best time to add fuel additives is right before refueling. The specific method is: when the fuel tank is nearly empty, go to the gas station, pour in the additive first, then fill up with gasoline. This ensures thorough mixing. I typically add a cleaning-type additive every 5,000 kilometers or so, because long-term carbon buildup can affect engine efficiency. After adding it, the engine runs more smoothly. If your vehicle starts showing unstable idling or a sudden increase in fuel consumption, it's time to add some. Timely cleaning can extend engine life. In winter, using winter-specific additives is better, as they offer stronger antifreeze effects. Remember not to add too much—just follow the ratio indicated on the bottle. Otherwise, it's wasteful and could have the opposite effect.

[LeGeorge]

From my driving experience, the timing for adding fuel additives depends on the vehicle's condition. For example, after my car had been driven for seven or eight years and the engine occasionally shook, I would add a cleaner before refueling, doing it regularly every three to four months. This effectively removes impurities from the fuel system, prevents injector clogging, and improves power response. For new cars, the manual may have recommendations; some additives are more suitable to be added after the first maintenance. Before long trips is also a good time, as additives can optimize combustion and reduce emissions. Be sure to choose reputable brands and avoid mixing different products randomly to prevent reactions that could damage parts. Ensure the engine is warm before adding to allow for even mixing.

[DiAlice]

I usually pay great attention to environmental protection when driving, so I regularly add some fuel additives when refueling. These additives help the fuel burn more completely, reduce exhaust emissions, and are beneficial for the air. The operation is very simple: when the fuel tank is almost empty, pour in the additive, then fill up the tank with fuel, letting it mix naturally. I generally add it every two to three months, especially after frequent stop-and-go driving in the city, which can prevent carbon buildup and keep the engine clean and efficient. When choosing additives, it's better to look for safe ingredients and certifications.