FJ is running great, but my MPG has been crappy.

[E Double]

I notice 10-20% change in mpg across every vehicle I own when going from winter to summer blends. 

Besides the snowblower, lawnmower and the FJ everything else is fuel injected.

So at least here, it must be the fuel.

[carsick]

First tank of gas done with, 199 miles and 5.09 gal = 39.1 mpg. That's probably 5 rides with some redline but most cruising in the 4-5K range. No idea about ethanol content or even octane, most likely it was 10% and 87.