Ok well on friday I filled up my nova with a full tank, and I didnt know that it had a 20 gal. tank. Is this standard on muscle cars? Well anyways I drove around friday and sat. and noticed I was down to a quarter tank. Well my mechanic friend was looking at my engine and noticed my fuel pump was leaking. So I got that replaced and replenished the 15 gal. of fuel used in under 150 miles of driving. Anybody know the average MPG on a nova?