If you're getting 200 miles to the tank, in all likelihood, you're probably getting more like 11.5 MPG..... which is still way below what it should be. Our cars have 20.5 gallon tanks, and the low-fuel light should come on with somewhere around 3.5 to 4 gallons left in the tank. I'm not sure how far you are pushing it in regards to running the tank low prior to fillups, but if you filled up right when the low fuel light came on and did 200 miles on that tank, you'd have gotten about 11.7 MPG for that tank.

Might not be a bad idea to run some Chevron Techron fuel system cleaner through your car by adding a can to the tank during your next fillup. All you do is buy the stuff at Pep Boys/Auto-Zone or some other auto-parts store, and bring it with you to the gas station. When you go to the gas station to fill up, shut your car off at the pump, pour the can of fuel system cleaner into your tank and then fill up with gas.

 

Im gonna run some bg 44k in my system

 

Hey man I saw that you are getting 10 mpg, I have the same problem right now with my 2007 g35x, did you ever resolve the issue?

 

Clean the air filters, check tire pressure, replace spark plugs as needed, don't push the gas pedal so much.