There have been reports of damage caused by the CRC cleaner. Something about breaking loose deposits and those deposits hitting hot turbo/engine components and breaking stuff.
As for the pistons being that clean, the use of E85 mixes might contribute to that.
* 2017 Fusion Sport, 12.7 @ 108 mph tune-only (early tune of mine, bad trans settings), full trunk w/ lunch, and dirty paper air filter
* 2014 SHO non-PP, 12.4 @ 111 mph tune-only, all day long with dirty paper air filter and worn out 30k RS-As