Can Laundry Detergent Be Used to Wash Cars?

[AutumnDella]

Laundry detergent can be used to wash cars for the following reasons: 1. The main cleaning components of car wash liquids are natural plant-derived surfactants. 2. Car wash liquids usually also contain natural car wax and ingredients that naturally remove static electricity from the vehicle body. Due to the addition of natural wax components, they can give the car body a neat and shiny appearance, provide a certain elasticity to the paint surface, and generally prevent small sand particles from scratching the paint. Some car waxes also have strong UV resistance, so ultraviolet rays generally do not pose a threat to the paint surface. 3. Car wash liquids are usually neutral, which means they won't harm your hands or the paint surface.

[OElla]

I usually enjoy tinkering with car washing, but I regretted using laundry detergent once. The alkaline ingredients in laundry detergent can corrode the clear coat on the car's paint surface, causing the paint to become dull and lose its shine over time, especially noticeable on dark-colored cars. Also, the rubber seals and plastic decorative parts on the car can become hard and crack when exposed to laundry detergent. Once after washing, I noticed the windshield wipers started squeaking, and later learned from an experienced driver that laundry detergent can't even dissolve stubborn stains like tar or tree sap on the car. Actually, the pH-neutral car wash soap used in car washes costs just over ten yuan a bottle and can be diluted into several buckets of water—why risk damaging your beloved car? Car washing is really a science; you've got to use the right products.

[DiGiselle]

As someone who has been washing my car by myself for a long time, I strongly advise against using laundry detergent. It's too alkaline – after just a few washes, the car paint can easily oxidize and fade, which is far from the effect of professional car wash soap. Once, after using laundry detergent, the sealing rubber strips around the door handles turned white and became brittle, which was not worth the loss. Moreover, laundry detergent produces too much foam; if not rinsed off thoroughly, the leftover water marks look particularly unsightly. I recommend using a foam spray bottle paired with a pH-neutral car wash soap – a bottle costing just over ten yuan can last for more than half a year. If you're looking for convenience, even the self-service car wash machines at gas stations are a better option than laundry detergent, as they are much gentler on the car paint. Washing a car might seem simple, but using the wrong tools can actually harm your vehicle.

[LaGrant]

Laundry detergent should not be used to wash cars! Its high alkalinity can damage the car paint and accelerate aging. Rubber seals exposed to laundry detergent are prone to deformation and cracking, severely compromising their sealing performance. I've seen cases where using laundry detergent to wash a car resulted in sluggish window operation. Professional car wash soap is pH-neutral, with a pH value between 6-8, which protects the vehicle's body. Stubborn stains require specialized tar removers - ordinary laundry detergent is completely ineffective. The concentrated solution designed for car wash machines is the reliable choice; it can be diluted as directed and lasts a long time - never try to save money the wrong way.

[MacAlex]

From a chemical perspective, laundry detergent with a pH of 8-10 is strongly alkaline, which is particularly harmful to the clear coat of car paint. Laboratory tests show that alkaline substances can break the molecular chains of the clear coat, leading to loss of gloss. Based on my comparison, cars washed with laundry detergent developed swirl marks within half a month, while those washed with pH-neutral car shampoo remained flawless for three years. Not to mention, the bleaching agents in laundry detergent can corrode alloy wheels, especially causing rust on metal edges. Actually, purchasing genuine car shampoo is quite affordable—just look for the 'pH-neutral' label on the packaging. In emergencies, even using body wash is better than laundry detergent, as it’s at least less alkaline.

[FernandoLee]

As an environmentally conscious car owner, I must say using laundry detergent for car washing is a lose-lose situation. Those phosphate-containing detergents washing into storm drains pollute water sources and damage aquatic ecosystems. Moreover, alkaline laundry detergents are harder to rinse off than professional car shampoos, wasting both water and time. My experience shows that eco-friendly enzyme-based car wash liquids work best - their natural ingredients degrade quickly without harming paintwork. In emergencies, diluted dish soap makes a better stopgap with lower alkalinity. But the ideal solution is keeping a portable car wash kit - just a foam spray bottle and water-absorbing towels can get the job done in ten minutes without environmental harm. Protecting your car and the ecosystem were never mutually exclusive.