My 2.3 litre 2015 MkC gets around 24-25 mpg. My 2016 Corvette gets almost 30 mpg on the highway because four cylinders of the V8 are automatically shut off during highway driving. The MkC has gas mileage which doesn't seem to vary much on the type of driving. I use premium gas from SHELL.2015 Lincoln MKC 2.0 Ecoboost. Gas mileage is not good at all. My 2018 Camaro SS gets better mileage than this. Anyone know why?