I just used up the last of my "old" (at least a couple of years old) stash of LC20. I haven't used FP60 in some time. I was an avid user of both of these products at one time but stopped using them. I notice there is almost no discussion about them here anymore. I typically run PP Platinum or QSUD in the vehicles these days and run top-tier gas in both (usually Shell when I can get it). I was considering ordering some more of both but am not sure the advantages outweigh the cost of the stuff.