The EPA has released fuel economy ratings for the 2.0 turbo of the 2016 Camaro.
Opting for the four coupled to the 8 speed auto Trans gets you 22 city/31 highway/ 25 combined. V6 Engines are slightly worse off with a 21 city/30 highway/24 combined rating.
These are in line with ratings for the ATS Cadillac.
Unfortunately because the four cylinder demands premium fuel the differences in estimated annual fuel costs between the 2.0 and the V6 are negligible.
Actually, in terms of fuel costs you could have had a V8 for an extra $250 per year…