So, I recently receive a 16 oz car shampoo in a mystery box. I have previously been using a gallon that I had purchased in late 2013. The two products are different, especially when considering the lubricity of the shampoo. The gallon I have is super slick and foamy, and I love it. The 16 oz doesn't seem to foam like the other, and is markedly less slick. I've been searching the forum to find any announcement of formulation change and cannot find one. Has anyone noticed this? I hope, if the formula has changed, that the gallon is actually newer than the 16 oz bottle! I really do not like the product in the bottle.