The GT86 is rated at 33.2mpg according to new WLTP figures (196g/km CO2), and this figure should be well within reach. You'll see less on a track, but on a motorway run the low rolling-resistance tyres, low weight, slick aerodynamics (it has a coefficient of drag of 0.27) and frugal engine all conspire to return figures upwards of 40mpg – more than welcome for those long trips on the way to entertaining roads or a trackday.
As for running costs, the GT86 is all about value for money. Porsche premiums need not apply here, which is well worth considering if you’re weighing up a GT86 against a used early Cayman or Boxster. The car comes with Toyota’s five-year warranty, which is enough to see out any ownership period for those who are considering buying on finance, while the Michelin Primacy tyres seem to last forever (maybe even too long, for those waiting to swap to something stickier!). Being relatively light and not over-endowed with power, consumables like brakes should last longer than on the average hot hatchback, too.