I have been a long time Mobil 1 user but am considering a test run of Redline. As seen in other UOA's, my concern is that oil analysis data from my first run might be skewed due to Redlines potent cleaning abilities. I will have about 30k on my engine when I start the Redline interval. From 500 miles on, my engine has had steady diet of Mobil 1 10w-30 and 0w-40. My question is this. Will an Auto-RX treatment prior to switching to Redline minimize the "clean-up" factor so that I can trust my UOA results? I think Terry may have mentioned a similar process. Question part 2 - If I do elect to do an Auto-RX, should I add it to the end of my Mobil1 interval or, refill with dino and run it for 500 or so miles?