Is it recommended to add fuel additives to cars?

[Viola]

Whether to add fuel additives to a car can be decided based on the specific situation of the vehicle. The details are as follows: 1. The function of fuel additives: The main function of fuel additives is to remove carbon deposits from the engine and fuel injectors. 2. Usage scenarios: If a car has been driven for a long time and has excessive carbon deposits, cleaning may be necessary. Information about fuel additives is as follows: 1. Fuel additives: (also known as gasoline detergents or fuel additives) are a type of automotive chemical and a common name for the third generation of gasoline detergents. 2. Traditional fuel additive composition: Traditional fuel additives mainly consist of PIBA (polyisobutylene amine), which can effectively remove carbon deposits in multi-point fuel injection vehicles. However, in the high-temperature and high-pressure environment (combustion chamber) of direct injection vehicles, its volatility is poor, and it quickly forms deposits.

[StCody]

As a veteran driver with nearly a decade of experience, fuel system cleaners are definitely not a necessity. New cars don't need them at all for the first two years - the engine internals are spotless. I've used some big-brand products in my older car a few times, and while they did make the throttle feel slightly more responsive during acceleration and reduced carbon buildup somewhat, the effects were marginal at best. What really annoys me are gas station attendants aggressively pushing off-brand products - not only are they overpriced, but they might even damage your car. If your vehicle mainly does short trips or uses lower-grade fuel, using an OEM-formulated cleaner every 30,000 km might be okay, but only if the owner's manual recommends it. For regular driving, sticking to timely oil changes is far more important.

[NorahDella]

Having worked in the repair shop for so long, I've noticed that fuel additives are quite controversial. For direct injection engines with severe carbon buildup, using the right one can indeed clear the fuel system, and clean injectors can slightly reduce fuel consumption. However, many new cars now come with built-in detergents from the factory, so adding more is just a waste of money. The worst scenario is when customers use off-brand additives indiscriminately, clogging the catalytic converter, which can cost thousands to repair. My advice is to follow the maintenance manual—if the manufacturer doesn't require it, don't bother. If you really want to use one, choose a legitimate product with PEA (polyether amine) content, one bottle every 5,000 kilometers is sufficient, and it's easy to pour in when refueling.

[LaJameson]

Fuel additives depend on the situation. German cars that frequently drive on highways can use them appropriately, especially turbocharged engines which are prone to carbon buildup. For example, my friend's Audi was advised by the dealership to add them regularly. However, Japanese naturally aspirated cars really don't need them, as their design is less prone to clogging. I've tried them a few times myself and felt the psychological effect was greater than the actual benefit. It's better to focus on fuel quality in daily use—avoid small gas stations, as 95-octane fuel contains more cleaning agents than 92-octane. Modified cars may see noticeable effects, but for regular family cars, it's not very meaningful. Saving the money to fill up an extra tank of gas is more practical.