By Baxter Overman | May 18, 2025 in 
Confused or curious about what is classified as car soap? It’s understandable because not all soap or foam-forming car wash products are the same. Some aren’t even designed for cars.
Like kerosine vs gasoline, additives can make similar car wash products slightly different from one another. It’s important to know the differences to know which car soap you need.
What to know about car soaps
When you hear the phrase ‘car soap’…know this term can mean a few different things. Many people use car soap as a term to include anything with suds, but products like foams and detergents live in the pre-wash or paint prep category.
For example, Dawn dish soap—a product people mistakenly refer to as their car soap— is technically a detergent/degreaser that strips off wax and isn’t ideal…more on that later.
What is car shampoo?
Car shampoo or car wash shampoo is a type of concentrated car wash soap with lubricating additives, normally sold in smaller bottles (and are less watery). Shampoos are often diluted at a different ratio than general-purpose soaps, so you need very little product per gallon of water.
General-use car soaps and shampoos both produce suds, and both are ideal for normal ‘maintenance’ washing with a wash mitt.
Cheap car wash soap vs premium car shampoo
Cheap car wash soaps sold in large containers may or may not contain waxes and protectants, and generally don’t work as well as premium shampoos.
Cheaper soaps often don’t create as many suds, so you have to keep re-adding soap to the bucket or risk scratching the paint due to a lack of lubrication.
I like a mid-grade car shampoo like Meguiar’s Gold Class. I’ve been using it for years, and think it’s a great product for beginners.
Meguiar’s Gold Class Car Wash Shampoo and Conditioner
What I like
Cleans and conditions, affordable
If you click this link and make a purchase, we earn a commission at no cost to you. Thanks for your support.
What is snow foam used for?
That foamy, shaving-cream-like car soap.…that’s snow foam. Some normal car soaps will contain words like ‘high foaming’ but most are all-in-one products you can use in a bucket and a foam gun. However, dedicated pre-wash snow foams (specifically made for detailing) are generally formulated to create thick, fluffier foam in a foam cannon.
That’s because pre-wash snow foam can carry away dirt on its own, without agitation. Unlike car shampoo or regular soap, snow foam may not contain the same lubricants or waxes helpful for your hand-washing routine.
If your vehicle is really dirty, start with snow foam; from there, finish by washing by hand washing using a soap that contains more lubricants or wax.
When not to use snow foam
If you keep your car protected and don’t have a ton of visible dirt, snow foam can be overkill. I think of it as an emergency soap I use after driving through mud or going to the beach.
Can dish liquid be used as car soap?
Dish liquid shouldn’t be used for routine maintenance washing like car wash soap, because it removes waxes and other protectants! Products like Dawn are actually detergents, not soaps, so they can remove grease, wax…and more than dirt. They can also leave a thin layer of dried salt and surfactants!
That’s why it’s best to use car shampoo or soap every time you wash. If your goal is to purposely remove all wax…there are wax stripping soaps for that.
Check out my in-depth post on dish liquid in the car care world to learn more about this controversial topic!
Getting started with car wash foam
To create snow foam, you’ll need either a gas or electric pressure washer and a foam cannon.
If you’re considering using foam, check out these pressure washers for beginners under $300 I recently covered. Gas-powered pressure washers are generally better at creating thick, sprayable foam.
Hope this post has cleared a few things up :)
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