Third tank is in! I live at the top of a ridge, around 180 meters above the city of Wellington. I'm down in the city most days, and this tank was almost 100% driving up and down, to and from the city.
Result? 6.74L/100km, or 34.9mpg. That's 17% above the car's city rating.
Halfway through the tank I increased my tire pressure from 2.75bar (40PSI) to 3bar (44PSI). There was a pretty drastic increase in harshness, and I believe tomorrow I'm going to let a bit of air back out. These are pretty large tires for such a light vehicle, and I expect I'm pretty far into diminishing returns anyway.
That aside, I ordered my first two upgrades. One replaces the long factory antenna (which I don't use) with a stubby, and the other is a clear plexiglass blockoff plate that sits between the headrests. The plate's design purpose is to drastically decrease cabin noise with the top down on the highway (which it does, supposedly) but I interpret this to also act as a spoiler and decrease drag. Since I drive with the top down 99% of the time, this ought to be a noticeable improvement.
