Gtechniq Car Shampoo. Auto W1 GWash Shampoo for Cars. Dirt and Stain Remover Car Cleaning Kit with Pink Grapefruit Fragrance. 100% Biodegradable Foam Cleaner, Wheel Cleaner and Screen Wash - 500ml

I've tried countless car shampoos, but Gtechniq's W1 GWash has completely transformed my detailing routine. After receiving a sample pack at a car show, I was immediately impressed by the product's performance.What sets this shampoo apart:Ultra-concentrated formula means a little goes a long wayExceptional cleaning power without stripping wax or sealantspH-neutral formula that's gentle on paintworkCreates incredible lubrication for safe, scratch-free washingLeaves an immaculate, streak-free finishI've used this on my 911 and several other vehicles, and the results are consistently outstanding. The suds are rich and thick, making the washing process not just effective but enjoyable. Whether you're a car enthusiast or just want a professional-grade clean, Gtechniq W1 GWash is a game-changer.Highly recommended for anyone serious about maintaining their vehicle's appearance.Pros:Professional-grade performanceEconomical concentrateSafe for all paint typesCons:Slightly more expensive than standard car shampoos (but worth every penny)

Love this car shampoo. Cleans really well and the bit I love is that it leaves no residue or streaks on the car after you’ve rinsed it off.Great value for money as a little goes a long way. Good foaming as well which lifts the dirt off the paintwork to minimise scratches.

Great product. Good suds and doesn’t strip the wax layer.

Slick feeling on paint cleans well and doesn't seem to harm the C2V3 coating underneath. Smells good as well which is bonus. I guess best compliment is that I'll buy again. 2 caps in typical detailing grit guard bucket foams well and doesn't loose the foam like some do.

If you have had your car ceramic coated this is the wash for your car

I’ve been using Gtechniq W1 Auto Wash for several weeks now, and it’s quickly become one of my go-to car shampoos. As someone who takes pride in maintaining their vehicle properly, I look for products that offer great cleaning power without compromising paint protection—and W1 delivers on all fronts.This shampoo produces low suds, which may surprise those used to thick foaming shampoos, but don’t be fooled—its cleaning performance is excellent. It effortlessly lifts dirt and road grime without needing excessive product, meaning a little goes a long way. It rinses cleanly with no residue, leaving behind a spotless, streak-free finish that really enhances the appearance of the paint.One of the standout features is that it’s completely wax and sealant-safe, making it perfect for maintaining ceramic coatings or synthetic sealants without breaking them down. It’s also highly concentrated, so you only need a small amount per bucket, adding to the overall value.If I had to mention a minor point, it would be that because it’s a low-suds formula, it doesn’t offer the “foamy wash” experience some enthusiasts enjoy—but this is purely personal preference and doesn’t impact its cleaning power at all.Overall, Gtechniq W1 Auto Wash is a professional-grade shampoo that does exactly what it claims. It’s a high-performing, no-nonsense product that works brilliantly for regular maintenance washes. I’ll definitely be buying it again and would recommend it to anyone serious about proper car care.

This smells nice and does the job well but a cost of over £14 for 500ml looks very expensive particularly against Autoglym which does the job just as well. I bought it once but won't be buying again as it just doesn't seem good value.

Really pleased with this product as cleans the car really well. Leaves a streak free finish.