What Causes Increased Fuel Consumption in Older Vehicles?

1 Answers
AlexanderFitz
07/30/25 12:19am
Here are the reasons why older vehicles consume more fuel: 1. Excessive carbon deposits in the engine: The operation of a car relies on the combustion of gasoline, which inevitably contains some impurities. Over time, these impurities accumulate and form carbon deposits and sludge on the engine surfaces. This not only damages the engine but also leads to issues like difficulty starting, high idle speed, and excessive exhaust emissions, all of which increase fuel consumption. It is recommended that owners use specialized engine cleaners to remove carbon deposits and sludge without disassembling the engine. This not only reduces fuel consumption but also minimizes the impact of carbon deposits on engine performance, keeping the engine in optimal condition. 2. Overburdened air conditioning system: Summer is the peak season for air conditioning use. After prolonged use, dust and grime can accumulate in the AC system, fostering bacteria and producing unpleasant odors in the cooled air, which also increases fuel consumption. Owners should clean the AC system regularly using AC cleaning agents after extended use. 3. Accumulated dust on the car body: The primary resistance a car faces while driving comes from air. Excessive dirt and dust on the car body increase this resistance, which may seem minor but can significantly raise fuel consumption. Regular washing of the car body is advised, followed by waxing to protect the paint and reduce friction between the car body and air, thereby lowering fuel consumption.
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