I have a 2004 WRX that's tuned Stage 2 with the COBB AP. I filled my tank completely,reset my trip meter, and ran it until it went to the empty light. my odometer read at 200.4 miles.
I know the tank size is 15.9 gal and the Light probably comes on with about a gallon or more in. So that equates to roughly 14.5-15 gallons of gas used only getting 200 miles = 13.3mpg!
Is this normal to see such a radical drop off in fuel economy?
The vehicle has 94,500 miles on it.
Mods include: Invidia down pipe, Invidia up pipe, HKS catback, STI intercooler with samco hoses, and Grimmspeed Lightweight Pulley. and like i said before i'm stage 2.
Also i just recently changed the fuel filter and used some fuel system cleaner with no change.
Lastly i wasn't driving the vehicle hard either. I made a point to drive the optimum speeds on the freeway and never really pushed it hard during acceleration.
Any help or thoughts on the issue would be helpful, thanks!