Car pro reset, although expensive, is one of the best car wash shampoos I have ever used (and I have over 20). Dilution ratio is insanely low, so it goes a long way. Lubricious soap that offers excellent cleaning and rinsing ability and smells great too. I would’t suggest this for weekly maintenance wash on on uncoated vehicle, as it does degrade LSP slightly, but once a month for a refresh/deeper cleaning it’s awesome. I bought the 500ml, then the 1L and now the 4L. Save yourself some money upfront and get the largest size you are willing to purchase. You won’t regret trying this shampoo.