Meguiar's recommends the spray on Quik Detailers as a lubricant for clay bar cleaning of a car's finish. I've used the Ultimate Quik Detailer in the black spray on bottle as as well as Quik Detailer in red spray bottle with good results.I needed some more lubricant for my next clay bar and looked up the Meguiar's products on Amazon. I found a 1 gal jug of Quicik Detailer, which is #66 in Meguiar's Professional Series. The price was right, so I ordered a gal.When I received it, I quickly discovered that the #66 Professional Quick Detailer product is a one step cleaner wax and not at all similar to the spray on Quik Detailers found in Meguiar's Ultimate (black), NXT (purple) and Classic (red) product lines.Why Meguiar's would market 1 product called "Quick Detailer" and 3 other products called "Quik Detailer" and the products be completely different is beyond me. I guess this is what I get for not reading the fine print and trying to save a few dollars in buying a gal jug.