Hello, new here. Nice to meet you all
I own a 1995 Volvo 940 turbo wagon, and when I first got it a year ago I was averaging 8mpg (3.4km/L) pure city driving. I changed my driving habits and now I usually maintain 15mpg (6.4km/L), almost double but not quite good enough.
So, I'm here to learn clever ways to improve my mileage, particularly through aerodynamics because the car has a .33cd and I'm going to be doing a lot of highway driving soon. Where to begin?