Hey there,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.
would you say you noticed a long term difference in burning premium versus standard? I get decent mileage with standard 87. Wondering if it’s worth the xtra cash for a few extra miles each tank.