Read a mechanic's blog recently where he tested this on aluminum cranks and found that grease actually stops the pedal from fully tightening because it acts like a lubricant between the threads. He said the real fix for seizing is just using a tiny bit of anti-seize compound instead of grease, since it prevents corrosion without making things too slippery. I've been greasing pedals for years too and never had one come loose, but now I'm wondering if I've just been lucky with my crank material. The guy in that blog pointed out that most pedal loosening stories come from people who overtighten to compensate for grease, not from the grease itself. Honestly, I'm probably gonna switch to a DRY install or just a smear of anti-seize for my next set, just to play it safe with my carbon cranks.