2.7 ECO. 27k on the clock (9k on new engine). Always run top tier, 93 octane, fuel. Oil changes with SYN every 5k, at least. Lately, while in neutral, the engine will drop to about 350 RPMP, stumble, catch itself and then return to an idle around 650-750 RPM's. It's repeatable, almost on a cycle of about every 10-12 seconds. I do not notice, while stopped, in D, S, or R.
I'm due for an oil change, so I'll have the dealer look at it. Any thoughts, though?
Shumax