You don't say what kind of driving you are doing so here is a range. My record is 484 miles when all on the Interstate (about 75-80 mph). When all around town driving I get between 320 and 340 mile between fillups.
It is in the gas tank.
525 miles
17.0 gallons (64.3 liters)...
I have a 2000 impala 3.8L v6 and it costs $65 at $1.20/L in Ontario Can. I get about 450-490 km per tank. Maybe I need a tune up?
It is in the gas tank.
The gas tank on the 2012 Chevrolet Impala holds 17 gal..
The gas tank on the 2002 Chevrolet Impala holds 17 gal..
The gas tank on the 2009 Chevrolet Impala holds 17 gal..
The gas tank on the 2005 Chevrolet Impala holds 17 gal..
The gas tank on the 2014 Chevrolet Impala holds 18.5 gal..
The gas tank on the 2006 Chevrolet Impala holds 17 gal..
The gas tank on the 2001 Chevrolet Impala holds 17 gal..