Got the first tank in for a 2016 Impreza 2.0 cvt awd sedan, 613 km and 43.104L for 7.0l/100km or 33.6mpg. Doing mostly hwy. Not bad, not really good either.
Its got some aggressive engine braking down hills in the CVT programming that really hurts some free coasting and mileage, as in my area as the hills aren't very long. They ditched that in our 2018 Outback.
I filled up on the rez, so I splurged on some 90 octane to see if its knocking at all and pulling timing on 87, but I doubt it. The Outback holds much lower revs more often so it might benefit from higher octane?