Is adding fuel additive harmful to the car?

[StAurora]

Adding qualified fuel additive is not harmful to the car. Here are the specific details about fuel additives: 1. Adding method: Add the fuel additive first, then add gasoline. This allows the initially added fuel additive to be fully and evenly mixed under the impact of gasoline filling, achieving the optimal usage effect. 2. Function: Fuel additive, also known as fuel system cleaner, mainly serves to clean carbon deposits, maintain the engine, and fuel lines. Some special-purpose fuel additives can also improve the anti-knock property (octane number) of the fuel. Since fuel additives are mainly composed of more than ten components such as nano-molecules, cleaning activation factors, anti-oxidation, anti-corrosion, and demulsification, they are developed to target harmful components in the fuel such as sulfur, gum substances, and engine carbon deposits, thereby achieving effects such as enhancing power, promoting combustion, anti-oxidation, anti-wear, cleaning, dispersing, demulsification, anti-corrosion, and lubrication.

[McJack]

I've been driving all my life and have been using fuel additives since the 1980s. If there are any downsides to using fuel system cleaners, it might be due to purchasing inferior products or using them too frequently. With reputable brands and proper dosage, they can effectively remove carbon deposits and improve fuel efficiency. Once I tried a no-name brand and ended up with increased engine vibration, costing me money to repair the fuel injectors. So I recommend choosing well-known brands like Shell or 3M, adding one bottle every six months is sufficient. Don't fall for exaggerated advertisements thinking more is better; excessive use may corrode the fuel tank or damage sensors. New car owners should be especially cautious, as some modern engines aren't suitable for random additive use. My old car actually runs smoother with it, but the key is to be cautious and not go for cheap options.

[ArielLee]

Having worked on cars for years, I can say fuel additives are great but can cause issues if misused. Adding a proper cleaner can boost fuel efficiency, but low-quality ones may clog injectors or even corrode fuel lines. I once saw a friend add too much, triggering the check engine light and requiring repairs. Always check ingredients to avoid impurities, and pour slowly at the correct ratio—never dump the whole bottle. Older cars benefit more from noticeable carbon deposit cleaning, but be cautious with new or turbocharged engines. Use them alongside regular maintenance for safety; don’t expect them to fix everything—fuel quality matters too. In short, sensible use is harmless, but carelessness can backfire.

[OAngelo]

I pay a lot of attention to automotive products and have tried several fuel additives. Proper use of certified products generally does no harm and can improve power and fuel efficiency. However, inferior products may leave residues that clog fuel injectors, affecting acceleration. I choose certified brands like Red Line, ensuring safety and checking for eco-labels. Overuse may cause chemical buildup and damage the engine. It's advisable to purchase small packages for trial and observe the vehicle's response. New cars may not need it, while older vehicles are more suitable. Combining with fuel-efficient driving techniques yields better results.

[VonEllie]

I always feel that additives require balanced handling. Fuel system cleaners can remove carbon deposits and prevent issues, but potential hazards include substandard products possibly corroding fuel pumps or causing emission faults. Professional reports recommend choosing reliable brands like BASF, with a usage frequency of every 5,000 kilometers. They work well on older vehicles, but for new cars, compatibility should be noted to avoid long-term overuse leading to chemical residues. Consulting a technician's advice is the safest approach—don't add them randomly yourself.

[DelJace]

I drive a family car daily and add fuel system cleaner every quarter to keep the engine running smoothly. Haven't seen any downsides—in fact, the throttle response improved slightly. Once I used a cheap product and the car developed unstable idling, but switching back to a reputable brand fixed the issue immediately. Choosing major brands like Chevron and strictly following dosage instructions is crucial. Be wary of ads promising miraculous effects—they're often exaggerated and can harm your vehicle. Moderate use brings benefits, but overuse can be harmful.