Glad to hear the drive went alright.

As far as things to do, it's actually best case for a vehicle to just sit on the highway like that. Usually really goo for it. I'd clear the o2 code and see if it returns. otherwise, don't worry about it. Other stuff only needs to be done as scheduled, rotating tires with the next oil change, changing the oil at the next normal interval. Nothing that should specifically need to be done unless it's a result of something you noticed or a problem you ran into.

I've got to ask, did you listen to any of the music I threw out there? Like any of it?

How many gallons were you putting in at each fill? I'm curious as to your MPG's. It's possible you were trucking into / with the wind, on the way down/back up. that could affect the mileage a lot. Other things would be elevation, cruise speed, etc.

Just throwing it out there, I use the gasbuddy app to find the cheapest gas around. It's invaluable, and has saved me hundreds of dollars. Makes a big difference if 5 miles down the road you can save 50 cents a gallon. Adds up over time.

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'10 X5 35d- 279k mi, deleted and DUDMD stage 2, daily and tow vehicle
'01 330i- Drift car: SLR Super angle, BC coils- keep it simple
'07 335i 6mt - Sold @ 171k miles- stage 2 daily commuter for 2 years