In my 06 TSX. The low fuel warning light came at exactly 14 gallons with 28 mile approximate range so when it becomes zero. I would put around 14.7 gallons.
Here in 09 The range on fuel is showing 90 miles but low fuel warning light has turned on. since it is 18.5 gallon tank. So does it mean it came at same 14 gallon mark.

 

hmm......my low fuel light goes on with 50 miles left. I usually put in 16.1 gallons. I did manage to hit the magic 500 mile mark on one tank of fuel today

 

thanks for reply. does it mean that when ur range becomes completely zero than u put 16.1 gallons.

 

from my understanding when the range hits 0 your car will go on reserve gas - 2.5 gallons. I usually get in 16.XX gallons at fill up. Tank is 18.5 i believe.

 

Just so it's perfectly clear...in my 1st gen TSX, I could still go approx 50 miles AFTER the gauge said 0 miles remaining. I would usually fill-up within 25 or so miles and put about 13.5-14 gallons when re-filling.

Is this still the case with the 2nd gen TSX? I know the tank is a gallon bigger in the 2G, so I'm expecting to put 14-16 gallons for a fill-up. Thanks for any replies.

 

The range is the computer's estimate based on a number of factors (such as your average MPG), not the amount of fuel you have in the tank. There have been times where I drove many miles after the range hit zero, and I still had quite a bit of fuel in my tank. The range is a computer estimate like the MPG...if you calculate the MPG by hand, the computer's MPG differs from the actual MPG.

The low fuel indicator is based on fuel level, and it is set to go on early for idiots so that they don't become stranded on the side of the road.

If your driving style is consistent, I suppose your range will usually be close together when the light goes on. For me, it varies wildly. The only time I use range is when I'm low on fuel but I don't want to buy gas yet. I then wait until the range hits 0 before I force myself to stop for gas.