Dave G. from Redline told me a few times that the esters used in Red Line ran clean but wouldn't clean. I thought that was interesting. With so many esters though it makes sense. But initially I was surprised by that.
Sure worked for me, no other top shelf or bouquet oil cracked the carbon jammed rings seal on my rings, with years of multi use. The first 1,500 miles of use, then no fuel dilution. It may not of clean them fully like VRP, but it sure cracked the seal wide open on my problem.