Car shampoo’s a simple thing, really, but there are now more options than ever, ranging from pricey and premium to the budget-first options, so which one is best? That's where this test comes in.

We tested all of our shampoos by using the ‘two bucket’ method, keeping one bucket with clean, soapy water, and another separate for rinsing out the dirty washing mitt or sponge. We made sure that the car we tested our products on wasn’t hot when we washed it, to avoid it drying too quickly, and then we dried it off with a clean microfibre cloth so that we could assess the finish on every surface, including the paintwork, chromework and wheels.

Price £9.99 (for 1Ll) | Buy from Amazon | Min price per litre £9.99

Very much aiming for a masculine, Germanic marketing angle, the Mer shampoo even has a rather aftershave-like scent to it. It is good shampoo, though, foaming up nicely, cutting through dirt and washing away easily for a nice finish. It leaves paintwork and glass slightly water repellant, but it’s not really any better overall than our similarly effective but cheaper  options.

Price £7.10 (for 1Ll) | Buy from Amazon | Min price per litre £6.50

This does what it says on the bottle. It smells pleasantly orangey and foams up quickly, holding onto its suds even if you take a while to work through the bucket of soapy water. It cuts through the dirt nicely, and (as the name suggests) dries quickly for a shiny finish. As with any car shampoo, you’ll still need to dry it with a chamois or microfibre cloth to avoid watermarks. It’s a perfectly fine shampoo, but it isn’t worth twice the price of the Simoniz and Turtle Wax.

Price £12.99 (for 5Ll) | Buy from Amazon | Min price per litre £2.60

Great value, and does the job. We rate the Turtle Wax and Simoniz products above this because they left our cars with a more noticeable sheen and water repellent finish, while the CarPlan really just gets the muck off. For the money though, it’s very fit for purpose and we had no unpleasant smears or residue to complain about.

Price £8.99 (for 473ml) | Buy from Amazon | Min price per litre £6.98

This shampoo gives a nice, smear-free finish and a glossy look to the paintwork. It also provides a coating that helps water to run off freely, so while it didn’t offer the same level of finish that we got from our more pricey range of shampoos, it’s still a decent result. It’s usefully cheaper when bought in the bigger 1.8-litre bottle, though – it’s much better value than the rather pricey 473ml bottle. 

Price £11.88 (5l) | Buy from Amazon | Min price per litre: £2.38 (5l)

It might look like washing up liquid, but Holts is perfectly effective car shampoo that also leaves a nice finish thanks to the wax. It didn’t make the paintwork as water repellent as others, nor leave quite such a high shine – hence a lower mark here. It still did a fine job of removing the dirt from the car, including stubborn bugs, and at this price it’s a very worthy option for a budget shampoo.

Price £22.99 (for 10L) | Buy from Amazon | Min price per litre £2.30

This product’s prestige name brings high expectations, and we weren’t disappointed. It foams enthusiastically and eats away at the dirt on the car, leaving a smooth feel and a high shine. We’d rate the finish as being generally very good, if not quite up there with the Autoglym and McLaren products. It’s great value, too, but the issue is that the small bottle pictured is hard to get hold of. It’s easiest to buy it from Amazon in pairs of hefty five-litre bottles, and this isn’t always ideal.

Price £14.99 (for 5L) | Buy from Amazon | Min price per litre £3.00

This shampoo is our pick of the lot for value, and it did a great job of cleaning our cars, getting the built-up muck off their sills without much sponging on our part, and leaving a clean, shiny finish that a dry microfiber or chamois finishes up nicely. It doesn’t leave quite the water-beading, glossy finish that other pricier options achieve, but at the price, it’s hard to beat. 

Price £12.99 (for 500ml) | Buy from Amazon | Min price per litre £25.98

The McLaren ceramic shampoo is as reassuringly expensive as you’d expect of a supercar-branded product. It is also excellent, though. It smells great and was the best here for leaving the paintwork feeling smooth, with a glossy finish that water beaded off. We barely needed to dry the car, it was so effective. You need to have the budget to justify it, but it is really outstanding shampoo.

Price £21.99 (for 1.5L) | Buy from Amazon | Min price per litre £15.99

This brew is pricey, but it gives fantastic results and is still better value than other high-end shampoos. It foams really nicely, smells good enough to wash your hair in, and cuts really easily through general dirt and heavy brake dust. It dries quickly and streak free, leaving paintwork feeling glossy and helping water to bead up and run off so the car looks cleaner for longer. 

Price £7.99 (for 2.5L) | Buy from Amazon | Min price per litre £3.20

The Turtle Wax shampoo proved the best all-rounder here. It’s fantastic value at £7.99 for 2.5 litres, and you only need a small amount in a bucket of water to have it foaming nicely, so it promises to last for ages too. It’s not just about price, though; it also did a fine job of removing grime from paintwork, wheels and chrome finishes. Plus, the wax aspect gives a really nice shine and helped to keep the paintwork looking smart for a good time afterwards. It’s great shampoo at a great price.

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