Why Does the Engine Sound Louder After Switching to Shell Gasoline?

[StGenevieve]

There are several reasons why the engine sound becomes louder after switching to Shell gasoline: Excessive Engine Oil: Many car owners mistakenly believe that more engine oil is better. This is a misconception. The amount of engine oil has a standard limit. If too much is added, it creates significant resistance to the crankshaft's rotation, affecting power output and increasing fuel consumption. Excess oil entering the combustion chamber leads to a substantial increase in carbon deposits, increasing piston movement resistance, reducing engine power, and raising the likelihood of knocking. Engine oil is akin to a car's lifeblood—it's crucial. The quality of engine oil affects the entire vehicle's performance, so it's essential to avoid using subpar oil that could damage the engine. Purchasing professional-grade engine oil is necessary. Severe Carbon Buildup: Over time, engine oil becomes thinner, leading to more carbon deposits. When new oil is added, the engine may not immediately adapt to the new oil's viscosity, causing higher RPMs and louder engine noise. This necessitates regular carbon cleaning. Removing carbon deposits is actually quite simple—using a professional engine internal cleaner, specifically a catalytic converter cleaner, can effectively remove carbon buildup, ensuring smooth catalytic converter operation and maintaining normal engine performance while also reducing fuel consumption. Engine Oil Viscosity: The difference in viscosity between old and new engine oil can also have an impact. Oil viscosity is inversely proportional to temperature. When the engine is cold, the oil viscosity is higher. If the oil is too thick at this stage, it can damage the starter motor and battery. Conversely, if the oil is too thin, it may fail to form an adequate protective film at high temperatures, leading to insufficient lubrication and increased wear on engine components.