Just did my third Conditional (Annual) on my 2013 CC. Has 160 TT. On the 340 engine. Runs like a top, really doesn't use any oil. Always use Camguard every 25 hr oil change. My IA Borescoped cylinders found very little lead on valves and cylinder, piston heads. He did however recommend TCP, and said it can only help.
Is TCP ok with the CC plastic fuel lines? Any info on the use of TCP for the 340 engine?
Feel free to chime in on the use of MMO in the oil before oil changes?😎