Meguiar's Gold Class Car Wash Shampoo and Conditioner 64oz/1.89L $21.99 + Delivery ($0 with Prime/ $59 Spend) @ Amazon AU

Retailer (per OzBargain): Automotive. Great car wash shampoo and conditioner, been using for years. Rarely goes this cheap on Amazon. Makes my car very silky smooth and shiny, almost blinds everyone on the road - Spotted on OzBargain's front page. Click through to see the discussion + votes.