When it comes to car cleaning products, Gtechniq paints itself as a car care brand with a clinical, scientific approach to car cleaning. Some of its protectants and sealants are a little complex but the GWash is a more familiar car shampoo that we’ve put to the test.
At face value, GWash appears expensive compared to car shampoo such as Meguiar’s Gold Class. But GWash is far more concentrated. Meguiar’s Gold Class shampoo needs to be diluted at a rate of about 25ml per litre of water, but GWash can be diluted at around 1.3ml per litre. So for a standard 10-litre bucket, you’re only going to need about 13ml, perhaps a little more if the car is very grubby.
GWash is also completely biodegradable and a very effective car shampoo. Our Citroen C1 test car bore a healthy layer of dirt, insects, and other muck. But after applying GWash, it didn’t any longer. Gtechniq says GWash works by generating a lot of foam, which ‘breaks the bond between the dirt film and your vehicle’s paintwork.’ It’s a fancy way of saying it gets foamy and removes the muck, which it does very well.
Verdict: A foamy and effective car shampoo that is fully biodegradable.
Score: 4.5/5
Price: RRP £12.95 OFFER £12.95 | VIEW OFFER
Pros: Very effective, easy to apply, can be heavily diluted, biodegradable, pH neutral
Cons: No timeframe given on biodegradability
Specs
Volumes available: 500ml (priced above), 1L, 5L
Biodegradable: Yes
pH neutral: Yes
Fragrance: Cherry
What’s good?
This is an extremely effective, foamy car shampoo. Whether you’ve applied snow foam beforehand or not, GWash still gets rid of all but the most stubborn of grim, such as tar spots. It also works reasonably well for cleaning wheels, though you will want iron fallout remover to give rims a deep clean.
Being pH neutral is important. It means GWash won’t disturb any protective coatings previously applied.
What’s okay?
Fragrances are subjective, and while the cherry scent is mild, it might not be to everyone’s preference. We tend to suggest that the best option is fragrance-free. Though, we seem to be in the minority on this one because an awful lot of car shampoos contain a fragrance of some kind.
Any negatives?
While it is classed as biodegradable, it’s not readily biodegradable and care still needs to be taken with any runoff. You still need to adhere to your local rules about where car shampoo runoff needs to go. Similarly, it can still cause skin and eye irritation, so you need to be careful with application too.
More items to consider
Zirconite Wash And Wax Shampoo, RRP £11.99
Bilt Hamber Auto-Wash, RRP £16.95
Diamondbrite Max Foam Shampoo, RRP £8.95
How GWash was tested
Using a grubby Citroen C1 as a test car, Gtechniq GWash was applied and also compared directly to car shampoos from Autoglym and Autobead. This was to not only get an idea of how GWash performed on its own but also how is performed in comparison to a couple of rival products.
Sign up to the Parkers Newsletter to keep up to date with more of the latest reviews, news, and recommendations from the Parkers team.
Just so you know, whilst we may receive a commission or other compensation from the links on this website, we never allow this to influence product selections – read why you should trust us.
