What are the symptoms of a car after adding low-quality gasoline?
3 Answers
Car symptoms after adding low-quality gasoline: 1. Difficulty starting, or even failure to start; 2. Engine shaking at idle after starting; 3. Obvious body vibration; 4. Foul-smelling exhaust gases; 5. Noisy valves; 6. Weak acceleration and high fuel consumption; 7. Gear shifting with impact. If the gasoline quality is very poor, a noticeable phenomenon is increased engine carbon deposits. The increase in carbon deposits may not be visible from the outside. If low-quality gasoline is frequently used, a significant amount of black carbon deposits can be seen inside the engine when inspected with an endoscope. Vehicle maintenance plan after adding low-quality gasoline: Completely drain the remaining fuel in the tank, refill with high-quality gasoline, clean the fuel injectors, clean the combustion chamber, and replace the fuel filter. It is recommended that car owners choose high-quality gasoline and the correct gasoline grade when refueling.
Last time I filled up with some cheap, low-quality gasoline, and my car started acting weird not long after. The engine was shaking noticeably at red lights, making the whole car tremble—I could even feel it in the steering wheel. When I pressed the gas pedal, the power was weak, acceleration was sluggish, and it struggled even on the highway. Fuel consumption was much higher than usual, and I watched the fuel gauge drop alarmingly fast. Thick black smoke came out of the exhaust pipe, with a pungent smell. The check engine light also came on, so I rushed to the repair shop. The mechanic said there were too many impurities in the fuel, clogging the fuel injectors and spark plugs. Cleaning them cost me a pretty penny. My advice: always refuel at reputable stations—don’t cut corners to save money. If this happens, don’t force the car to run; try adding some fuel system cleaner, but be sure to change the oil promptly to avoid engine damage. Neglecting these details could cost you enough in repairs to buy a decent used car.
If the car is filled with low-quality gasoline, you will first notice unstable engine operation, severe shaking at idle, as if sitting on a massage chair. This is because impurities in the fuel cause incomplete combustion, resulting in weak power output. The car feels sluggish when stepping on the accelerator, with delayed acceleration. Fuel consumption increases noticeably, dropping rapidly even on short trips. The exhaust may emit black or white smoke, indicating emission issues. In severe cases, starting becomes difficult, or the engine may even stall mid-drive, posing significant safety hazards. The best course of action is to stop and inspect the vehicle, then replace the fuel or add a cleaning agent to flush the system. Such fuel contains excessive impurities and moisture, which can corrode fuel system components over time, leading to high repair costs. Prevention involves choosing reputable gas stations and avoiding suspiciously cheap fuel.
