FWIW, My Tuner said, with the lastest version of AP, Cobb may have cleaned up some of the idle issues that happen over time to the OEM engines. He said the keep and eye on the idle issue. Mine has stumbled a few times, CEL P0172, and seems like it floods after a re-start. Mine seemed fine driving in today. Mine would have isues when I came to stop sign or pushed in the clutch on the highway too slow for traffic at the off ramp. Car has stalled twice over the last 6 weeks.
He hinted there is another Rev to the AP coming out in a few.
I wouldn't use seafoam at every fill up, but IMO once a year or so shouldn't hurt.
211,000miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here