Good Gas Mileage

My new Subaru is getting better than expected gas mileage.
24.8 mpg on the first fill-up (and I had to estimate the starting odometer reading because the dealer filled it)
25.9 mpg on the second fill-up
26.9 mpg on the third fill-up

I expect to see it drop soon, when I have to buy the government-mandated winter-blend gasoline with extra ethanol which typically gives 10% lower gas mileage.

Say, did you notice that the stock market hit new records highs today?
I blame the Republican tax cut package enacted 6 years ago.