But when Prime and Meg's were having their battle in the city in TF1, I noticed that Megatron was leaking energon. I finally bought the blu-ray of it and was stunned to see the white/blue energon blood leaking out. LoL, never will I doubt the power of Hi-Def again.
Yeah, it's deffinately some kind of liguid energy, though. Blackout also leaks some when he gets blasted by the F-22s.
Or. It could be spent energon. Like how blood travels to the organs ready to fuel cells and heads back to the heart and lungs in need of replenishing. the blue could be the spent stuff on its way back for replenishing of energon and the orange the fresh stuff.