Quick update: Got a call from the dealer this morning, extremely apologetic and entirely accepting blame. Said multiple times they will take care of it, since it's their fault. No attempts to deflect, dismiss my concerns, or anything else. That actually gives me some hope this will resolve amicably, whatever that happens to be.
They want me to drive it 100 miles or so then bring it in to inspect the oil before we decide on next steps. That seems like a pretty reasonable request. I'll try to do that today so we can hopefully have some answers soon.
My thinking at the moment for next steps, if the oil looks and tests okay:
• Request we continue doing analysis for at least the next few service intervals, in case accelerated wear is taking some time to show up.
• Provide a no-charge Toyota platinum warranty for the longest interval/highest mileage available, with the assumption the kind of damage this incident could have caused will be covered
• Keep an eye on things and treat my truck well as I always do - and watch for any signs of problems in the hopes nothing fails suddenly and catastrophically.
If it looks bad, or at least not great:
• Request a buyback, or trade for another truck that isn't broken.
• If they really want to push for replacing the engine/turbo (anything else this incident could have damaged?), I'd maybe accept that resolution. But that would need to be done in a reasonable timeframe (how long is that likely to take?). I would also need a loaner vehicle that I can attach my bike rack to, or at least haul my mountain bike in. Bike not touching my wife's i4.