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What car shampoo should I use to wash my car?
Short answer
Use a pH-neutral car shampoo made for automotive paint — it cleans without stripping wax or sealant. Avoid washing-up liquid and household cleaners, which are too harsh for paint, rubber trim and wax layers. A capful or two per bucket is enough; more shampoo does not mean a better clean.
pH-neutral: what it means and why it matters
Car shampoo labelled pH-neutral is balanced so it lifts dirt without attacking the protective layers on your paint — wax, sealant or ceramic coating. That is the whole point: you want the dirt gone and the protection intact.
Strong alkaline cleaners (like traffic film remover) have their place for very dirty cars, but for a regular wash, pH-neutral is the safe default.
What not to use
Washing-up liquid is the classic mistake. It is formulated to strip grease from dishes, and it does the same to the wax on your car — leaving paint unprotected and rubber trim dried out. Household multi-surface cleaners and laundry detergent are worse.
- Washing-up liquid — strips wax and sealant
- Laundry detergent — too harsh, leaves residue
- All-purpose household cleaners — can stain trim and damage coatings
- Hand soap bars — no lubricity, drag grit across paint
Shampoo vs snow foam vs waterless wash
Car shampoo is for contact washing with a mitt. Snow foam is a pre-wash: sprayed on, left to dwell, then rinsed off — it loosens dirt before you touch the paint, which reduces scratching. Waterless or rinseless washes are for light dust when you have no hose access; they are not a substitute for a proper wash on a dirty car.
For most people, a bottle of pH-neutral shampoo covers 90% of washes. Snow foam is the worthwhile upgrade if your car gets properly dirty.
How much shampoo to use
Follow the dilution on the bottle — usually one or two capfuls per bucket. More shampoo does not clean better; it just makes rinsing harder and leaves residue that attracts dust. If the water feels slippery, you have enough.
Common questions
What soap should I use to wash my car?
A pH-neutral car shampoo. It is formulated to clean automotive paint without stripping wax or sealant. Avoid washing-up liquid, laundry detergent and household cleaners — they are too aggressive for paint and trim.
What is the best car wash shampoo?
There is no single best shampoo — any reputable pH-neutral car shampoo from an automotive brand will do the job. What matters more is technique: two buckets, a wash mitt, and rinsing often.
Can I use hair shampoo to wash my car?
It is not advised. Hair shampoo is not pH-balanced for automotive paint and lacks the lubricity of car shampoo, so grit drags across the surface more easily. A proper car shampoo is inexpensive and the right tool for the job.
How much car shampoo do I put in a bucket?
Follow the bottle's dilution ratio — typically one to two capfuls per bucket of water. Using more does not improve cleaning and makes thorough rinsing harder.
How do you make your own car shampoo?
Some drivers mix their own with gentle soap and water, but homemade shampoo is hard to get pH-balanced and lubricated correctly — a poor mix risks the paint. A proper pH-neutral car shampoo is inexpensive and the safer choice.
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