I am 1000 miles in to my rinse phase and the engine is alot smoother on the highway and my MPG is back up to 24. where are I was getting 18 HWY. will be trying ARX in my wifes car next. funny thing is truck only has 37,000 on it and this stuff made this much of an improvement. I will be ordering another bottle and doing the maintance dose. sorry I cant take no valve pics as my valve covers are a PITA to get off. I will deff. recommend this stuff to other people that needs their engine cleaned out.