Weight was a huuuuuge factor in why these mid 80s early 90s cars got such great gas mileage.
Even a simple car like a focus weights +3000lbs these days.
Even American cars did better before all the extra weight from all these emissions and safety features.
I had a '92 Quad 4 grand am that I beat the living piss out of that still got 35mpg.
Just different times.
What's that?? You'd like an eco-tune...