Is It Necessary to Add Cleaner to the Fuel Tank?
2 Answers
Adding cleaner to the car fuel tank is useful, but it should not be done arbitrarily. There are two scenarios for adding cleaner to the fuel tank: conventional port fuel injection (intake manifold injection) and direct injection (high-pressure direct injection into the cylinder). These two types of engines clean different components. Below is a detailed explanation of adding cleaner to the fuel tank: 1. Since the cleaning solution is mixed with gasoline, for conventional port fuel injection vehicles, the fuel mist is sprayed from the injector in the intake manifold, passing through: the injector, manifold, intake valve, cylinder block, cylinder head, and piston head—meaning most of these parts can be cleaned. In contrast, for direct injection, the fuel mist is sprayed directly into the cylinder, cleaning only the direct injector, cylinder block, piston head, etc., missing several components compared to conventional port fuel injection. Therefore, in terms of effectiveness, conventional port fuel injection vehicles benefit more noticeably from fuel additives. 2. The 'dirt' refers to deposits such as gum, combustion carbon deposits, and coking residues that accumulate in various parts. These can significantly affect engine performance and fuel efficiency. 3. Cleaning solutions can be categorized as strong or mild. Strong cleaners can remove all the dirt in the fuel system with just one tank of fuel, while mild cleaners may require 4-5 tanks of fuel to achieve the same result.
In my experience, fuel tank cleaners aren't essential for routine maintenance, but they can be beneficial in certain situations. When I drive, I consider adding them after long trips or when fuel efficiency drops—like when the engine feels rough or has trouble starting, which might be due to sediment buildup clogging the injectors. Cleaners help dissolve these deposits, improving combustion efficiency and preventing potential issues. However, I use them cautiously—no more than once a year—and opt for reputable brands, as low-quality cleaners may corrode the system or damage sensors. Newer engines with better designs usually don't need frequent treatment, while older cars in high-pollution areas accumulate more impurities; a timely dose can save money long-term. Always follow the manual, avoid overuse, and pair it with regular oil changes and air filter replacements to keep your car running smoothly and safely.
