What is the function of gasoline additives?

[VanAdeline]

The following are the functions of fuel additives: 1. Remove carbon deposits and clean the fuel system: The new generation of fuel additives contains cleaning activation factors that can promote the harmful substances such as colloids in the fuel and engine carbon deposits. After adding fuel additives for 5 consecutive times, the carbon deposits on the exhaust pipe are significantly reduced, and the filter, exhaust valve, fuel system, etc. are all very clean. 2. Enhance power performance: The nano-components in the new generation of fuel additives can adsorb and wrap colloids, and under high temperature, they produce gaseous "micro-explosions" in the combustion chamber, causing secondary atomization of the fuel and complete combustion, thereby improving engine power. More than 90% of vehicles feel a significant increase in power after the first use of fuel additives. This is especially noticeable when the car is sluggish, old, carrying heavy loads, or traveling long distances.

[CadenAnn]

I usually pay great attention to car maintenance. Gasoline additives mainly address three pain points: First, they clean carbon deposits, especially for direct-injection engines where fuel injectors are prone to clogging. Additives containing PEA can dissolve stubborn carbon buildup. Second, they boost octane levels—older cars running on 92-octane fuel are more likely to experience knocking, and using additives is like a temporary fuel upgrade. Third, they protect the fuel system. I've seen many cars with fuel pump filters clogged by gum deposits, and regular use of additives can slow down fuel system aging. Once, my car idled roughly, but after using two bottles of additive, the throttle response became noticeably smoother. When the mechanic disassembled the engine, they found that most of the carbon deposits were gone.

[ColemanAnn]

Adding fuel additives is like giving your car health supplements, with the most practical benefits being carbon deposit cleaning and fuel saving. During my last maintenance, I found the piston tops covered in black sludge, and the mechanic said it would increase fuel consumption. Out of curiosity, I tried a bottle, and now on the highway, I save 0.8 liters per 100 kilometers. The key ingredient, polyetheramine, wraps around carbon deposits and expels them with the exhaust. It works best when added with a quarter tank of fuel left. For city drivers with frequent short trips, it's recommended to add it every 5,000 kilometers, especially for China VI vehicles with strict emission standards—repairing a clogged catalytic converter can be really expensive.

[LeKennedy]

I've been running a repair shop for over a decade and have seen countless failures caused by carbon deposits. There are actually three types of fuel additives: cleaning type mainly tackles gum in fuel lines, maintenance type contains lubricants to protect fuel injectors, and octane boosters are suitable for older cars in emergencies. Last time, a Camry had cold start issues - diagnosis showed excessive carbon buildup on the back of valves causing poor sealing, which was resolved after using three bottles of cleaner. But I must remind everyone: for vehicles with very dirty fuel tanks, clean them first before using additives, otherwise large chunks of carbon deposits breaking loose might clog the injectors. Choosing reputable brands is more reliable - those unverified products could corrode oil seals and cause bigger troubles.

[AmirLee]

The dealership recommended adding additives during the first maintenance of my new car, and it turns out to be quite beneficial. It forms a protective film to reduce metal friction and neutralizes sulfides in gasoline to prevent corrosion. I have a habit of tracking fuel consumption, and the comparison shows that continuous use significantly reduces engine noise, especially the knocking sound during rapid acceleration in turbocharged cars. Although a single bottle costs around 70-80 yuan, which is a bit expensive, it's much more cost-effective than cleaning the throttle later. However, be careful not to overuse it; if the manual specifies using it every 10,000 kilometers, don't arbitrarily shorten the interval.

[OAdalynn]

I used to think fuel additives were just a marketing gimmick until I borrowed my friend's aging Volkswagen Bora for a long trip. The engine would struggle above 3,000 RPM, but after adding half a bottle of octane booster, it miraculously regained power. These products primarily work by using methylcyclopentadienyl manganese tricarbonyl (MMT) to enhance knock resistance, allowing older engines accustomed to lower-grade fuel to unleash their potential. However, it's important to note that such additives cannot replace high-octane gasoline, and prolonged use may contaminate the catalytic converter. While they can serve as an emergency solution for occasional use, basic cleaning additives are a safer choice for regular maintenance.