This is how I read that statement:
With having lower EGT after whatever he did, he was ABLE to add more fuel because his EGT's were low enough to allow for more fuel. I don't know the whole conversation or where that is copied from, but from that quote right there, that's what it sounds like he meant.
Usually if you add fuel, you aren't gonna lower your egt's. More fuel or timing usually means more heat.