Must Fuel Additives Be Used Continuously for 6 Times?

[McParker]

Do not use continuously. Fuel additives do not need to be added consecutively. Excessive use can lead to increased carbon deposits in the combustion chamber while cleaning the intake valve deposits. If excessive addition continues, it may even cause engine knocking, detonation, and worsen vehicle exhaust emissions. Relevant details are as follows: 1. Composition: Fuel additives are functional substances added to gasoline to compensate for certain deficiencies in gasoline properties and to impart new excellent characteristics. The components of fuel additives are complex, but the main ones are combustion aids and cleaning agents. 2. Fuel Consumption: There is another type of fuel additive that reduces the probability of engine detonation by improving the anti-knock properties (octane number) of the fuel. However, long-term use of this method is not good for the car, as it can easily lead to the accumulation of a lot of carbon deposits, and conversely, fuel consumption may increase.

[DiEliana]

I've used fuel system cleaner a few times and know it's not mandatory to use it consecutively for six times. In principle, its effect on cleaning engine carbon deposits is gradual – a single dose can also alleviate certain issues like idle shaking or insufficient power. However, manufacturers designed the consecutive usage plan to achieve more thorough cleaning. If your car has severe carbon buildup, continuous use may yield more noticeable results. Based on my own vehicle's condition, I regularly add one bottle during each maintenance session for upkeep, without strict frequency requirements. The key is to observe the engine's response and follow the maintenance manual's recommendations. There's no need to rigidly adhere to the six-time rule.

[RosalieLee]

As someone who frequently tinkers with cars, I believe fuel additives should be used based on actual effectiveness rather than a fixed frequency. After a single application, you can feel some fuel consumption improvement after driving a few hundred kilometers—there's no need to insist on six consecutive uses. However, if carbon buildup is severe due to long-term neglect, like in older German cars, using multiple bottles in succession does provide deeper cleaning, something I've tested and confirmed multiple times. The key is to be flexible based on the situation and not be intimidated by merchants' bundled sales tactics.

[Megan]

There's no need to treat fuel additives like mandatory medication that must be used six times consecutively. Having used them for over a decade, the key lies in regular maintenance: one dose per tank of fuel effectively cleans fuel injectors. For new cars, an occasional bottle suffices to prevent carbon buildup. From an economic perspective, insisting on six consecutive uses is merely a marketing tactic—multiplying costs severalfold when on-demand usage is more practical. Ultimately, it depends on your vehicle's condition—if the engine shows no abnormal noises or sudden fuel consumption spikes, standard maintenance saves both time and money.

[MaximusFitz]

I've worked on many cars, and the claim about using fuel system cleaner six times in a row is quite misleading. There's no need to strictly follow that frequency: modern engines are well-designed, and adding one bottle can already improve combustion efficiency and reduce exhaust emission issues. Continuous use feels more like a sales gimmick – a single application is sufficient for routine maintenance. Of course, if you frequently drive on highways or operate in dirty environments, extra doses won't hurt but aren't essential. Just don't fall for the marketing traps.