How Much Fuel Additive Should Be Added at Once?

[LaKaleb]

One small bottle per tank of fuel is sufficient. Here are some precautions for adding fuel additive: 1. For new vehicles with less than 20,000 kilometers on the odometer, it is unnecessary to add fuel additive. For vehicles exceeding 20,000 kilometers, it should be added as needed, generally one small bottle per tank of fuel. 2. Long-term use of fuel additive can be harmful to the engine. Excessive use can increase carbon deposits in the combustion chamber. If excessive addition continues over a long period, it may even lead to engine knocking, detonation, and other issues, as well as worsen vehicle exhaust emissions. 3. Poor driving habits have a greater impact on the car than the use of fuel additive.

[MartinLee]

When I first started driving, I didn't understand much about fuel additive dosage and thought the more I added, the better the effect. In excitement, I poured the whole bottle into the fuel tank, only to find the engine shaking more violently and emitting strange smells. After taking it to a friend's repair shop, they said my reckless addition of additives caused incomplete combustion, which could easily clog the catalytic converter. Now I know that the maximum amount per tank should be one standard bottle, around 50ml to 100ml, proportionally based on the fuel tank capacity. It's most convenient to add it before refueling. I've also learned to read the instructions on product labels—some recommend reducing the amount for cars with severe carbon buildup, but never exceed the dosage. Nowadays, I also remind newbie drivers to add the right amount at a time to avoid wasting money and damaging their cars like I did.

[MasonAnn]

From my experience in car maintenance, the key to adding fuel system cleaner lies in balancing cleaning effectiveness and engine protection. Typically, 100ml of additive per 50 liters of gasoline is sufficient. Using too much may lead to chemical buildup in the engine, increasing wear or emission issues. I often recommend pouring the specified amount before refueling to ensure even mixing; it's best to shake the bottle beforehand to prevent sedimentation. Regular use helps clean fuel injectors and remove carbon deposits, but don't overdo it - once a month is adequate. Overuse just wastes money without added benefits. Remember that specifications vary by brand, so always follow the label instructions for safest results.

[LaJoel]

I usually drive to pick up and drop off my kids at school, and adding too much fuel additive at once is really not good. Our family habit is to pour the entire small bottle into the tank before each refueling, usually around 50ml, never greedy for more. I've consulted professional technicians who said excessive use can make the exhaust smell pungent and may increase maintenance costs. I've also noticed that sticking to the proper dosage makes the fuel gauge show better savings, and the engine runs quieter. Simply put, don't mess with extra stuff; following the standard ratio is the safest and most reliable approach.