High negative FLKC values on the highway
 

My motor and tune is stock, but I use the OFT to monitor IAM, FLKC, etc. It's about 50 degrees F tonight, and I'm getting negative FLKC values up to ~1.2 when moderately accelerating on the highway (throttle about half way). My IAM will stay at 0.70 and try to climb back up if I go WOT at high RPMs, but once it gets to ~0.90, negative FLKC kicks it back down.

I'm not sure if the gas I'm using isn't really 93 octane, or if there's something else wrong. I just had the front cover replaced because it was leaking oil, so they had to "re-silicone" it. I'm not sure if it's even related. The oil temps were around 212 F and coolant around 200 F. I wasn't able to log it as the traffic was really hectic, and I was in a hurry.

I'm paranoid, guys. I'd be grateful for any insight.

I'm about to use the stage 2 tune after I put on my headerback exhaust, but I'm afraid to do it if there's anything wrong internally. I don't wanna fight with Subaru.

Working as intended.

So there's nothing to worry about? :cry:

Well you COULD try some different 93 octane near you, but you're fine either way.

When you load the stage 2 tune, load the 93 octane tune, and if it's knocking in high RPM, you can try the 91 octane tune. The only difference is more timing in the upper rpms.

Have you done any modification to the exhaust? Does this show up upon throttle tip in?