Sorry should've been more specific. No not first thing in the morning. Later in the day, when the temp's are still warm and humid.

Isn't there something to do with Where the temp sensor is in relation to coolers, that it's reading oil not in the pan, but somewhere else, so it's usually 20*F off or so? So when you see 180*F, your actual temp in the motor is around 200*F?

You've got 300 miles on it. Take it to the dealer. Don't put any aftermarket parts on it yet until it gets a clean bill of health.

any diagnostic tools I can use to troubleshoot before taking it in to the dealer?

I wouldn't even do that much. I'd just take it in. Take the tech for a drive if you need to.

220 is normal for this car regardless of oil cooler or not, I have the stock cooler plus 34 row cooler, still hit 220+ on traffic.

How was getting the aftermarket cooler installed with the OEM cooler. Looking at putting one on a 12, and wondering how to put the sandwich plate. If there's room, or needing a filter relocate kit?

Even before any of my mods I would get 220* all the time during the summer. Personally I don't think 220* is going to cause a problem.

OP, one thing you can do that helps the oil temps is to turn the AC on. I use this trick when I'm autocrossing between runs.

220 isn't bad at all. You want the oil hot enough to burn off any condensation. I sit at 205-215 with a 34r cooler pretty much regardless of ambient temps.

Up in MD/PA, I can't get mine to budge over 180* without seriously pushing. :icon17:

I almost feel like my cooler is too much, but I got it when I was in Phoenix, and I plan on TT later on. So figured, it will suffice.

so does anyone in general experience sluggishness when driving after a while?

You might want to block off part of the cooler for now. Too cold is as bad as too hot.

Tell me about it... I forgot to put it on before winter. :facepalm: Yeah, 160* was a hard drive. :icon17:

Nice to know this, I live in FL and in the summer it's dead nuts hot. A 34r cooler is in my future and I would be worried if I hit 220 driving in traffic.

My experience post-oil cooler is the oil temp approaches 200 if either: a) heat soak induced city driving, which feels sluggish or b) driving like it's stolen. Other than that, the needle floats between 180 - 195 or lower when cruising on the highway.

However, pre-oil cooler my experience was basically the same as the OP. Oil temps were regularly between 215 - 230 or higher if driving even slightly hard. And I could forget about canyon runs; the temps would skyrocket to the 240 - 260 territory.