Nice to hear it's mint! Usually those are pretty thrashed 14 years later like this. Fun to drive, excellent choice.
Maybe it has the sticky rings issue that many Toyota-Scions-Hondas-I-dunno-what-else engines have that are around 10 years old or more.
This ring cleaning full synthetic oil might help:
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/5232562/1 from ryderfleetproducts.com
Uber may drop that car in a few months for its age limit. Lyft appears to have a couple more years on that one.
Is it possible to re-flash it back to factory tune?
That might help the fuel dilution, seen with flash point and viscosity dropping a bit there, as a high performance tune richens the mixture for more power & charge cooling.
Fuel economy would go up too, great for more Uber-Lyft driving.
Running normal E10 gasoline instead of E30 would improve MPG for sure. Ethanol has lower energy density, and if back to factory tune, E10 can be the norm.
Good to stay with a thicker oil like that with fuel dilution going on. These engines typically have Rotella T6 5w40 or a Euro 0w40 in them. Walmart's Castrol Edge 0w40 would do it for me.
Pictures of that cool ride maybe? We might put it in the next Fast & Furious movie.
(Never mind the rude poster above with the stupid "LOL" comment, there are a few posters like that around here.)