As an automotive care expert with years of experience in the field, I've seen a variety of methods and products used for cleaning vehicles. When it comes to the question of whether dish soap can be used to wash a car, it's important to consider the specific characteristics of the cleaning agent and how it interacts with the materials of the car.

Firstly, dish soap is formulated to cut through grease and grime effectively, which is why it's so good at cleaning dishes. However, car surfaces, particularly the paint, have different requirements when it comes to cleaning. Car paint is sensitive to the abrasiveness of cleaning agents.
Dish soap, being an abrasive soap, can potentially cause harm to the car's finish. The abrasive nature of the soap can accelerate the oxidation process of the car's paint, leading to a dull appearance over time.

Moreover, the wax coat that is often applied to cars to protect the paint and give it a glossy shine can be broken down by the harsh chemicals found in dish soap. This can result in the loss of the protective layer, leaving the paint more vulnerable to environmental factors such as UV rays, acid rain, and other contaminants.

In addition to the paint, car exteriors also include various types of rubber components, such as trim, seals, and tires. Dish soap can be particularly tough on rubber, causing it to dry out, crack, or become brittle prematurely. This can lead to a decrease in the lifespan of these rubber parts and may even affect the car's performance and safety.

When washing a car, it's crucial to use products that are specifically designed for automotive use. Car wash soaps are pH balanced and formulated to be gentle on the paint while effectively removing dirt and grime. They also often contain ingredients that help to preserve the wax coat and protect the paint from damage.

In conclusion, while dish soap is effective for cleaning dishes, it is not recommended for washing cars due to its abrasive nature and potential to damage the car's paint, wax coat, and rubber components. It's always best to use products that are specifically designed for the task at hand to ensure the longevity and appearance of your vehicle.

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While it does a good job at that, it's good because it's considered an abrasive soap. But, when you use an abrasive soap on something like car paint, it accelerates the oxidation process and gives the car a dull look. Dish soap will also break down a car's wax coat and can be tough on rubber.Nov 26, 2014read more >>