I read somewhere that it is a bad idea to wait to fill gas when it shows empty. why? because it said something about damaging the fual emissions system.

 

It wears out your fuel pump quicker. I hear it's best to fill up when you're down to 1/4 of a tank.

 

exactly.. your fuel pump gets more wear when the gas is lower in the tank, I have had a lot of ppl tell me never to let a fuel injected car get below 1/2 tank because of how hard the fuel pump has to work below a certain level.

 

On 94-97 accords the fuel guage was actually setup so that on the 17gal tank it would show empty at 12, that way it protects the fuel pump. But yes, going below 1/4 tank isn't good for the pump.

 

also, i once owned a camry and in the manual it said it is bad for the catalytic converter. so, that could be an issue as well but i am not sure for our accords. i do know that there is a 3 way catalytic converter on the accord (at least in this 6th generation).

 

I just found this out when I saw that I only went 350miles and the fuel gauge was already near empty. Thought I was gettin pretty bad gas mileage until I went to fill up and saw that it only needed 12.5 gal.

 

ah that makes much sense. here i thought my gauge was going out. when i refill i only put about 12-14 gallons in, im like wtf i had more in there! i have a bad habit of procrastinating that stuff, i shouldnt wait that long...

 

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So for best results fill it up to full when it has 1/3 near empty?

 

The gasoline cools & lubricates the pump. So the most important thing it NEVER let it go all the way empty.

When it gets close to empty, there's a greater risk of sucking air if you park on a hill or go around a corner fast.