keeping fuel at full?

[skullhuntre]

Hey everyone,

I have a 2002 corolla S @ 46k miles and because of my job I drive about 100 miles a day monday-friday from my home in Miami to my job Ft lauderdale, Florida. After using a few iphone applications to measure my MPG and how to get the most efficiency of my car, Ive changed how I drive (under 60) got rid of the excess baggage, and searched for the cheapest stations in my area.

My question comes from a few thoughts I had while driving to work today. I usually spend about a quarter ~ $10 in gas @ 3.079 a gallon to get to and from work but I always refuel back to full when I leave my job. I am wondering if this is necessary or if I should let the fuel drop down to about half, or a quarter then refill? I live in Miami and the climate can get pretty hot and I also thinking about those extra gallons adding weight to the car.

Any thoughts on when i should fill up and the optimum level of fuel based on my driving?

Thanks

[Zembonez]

Modern vehicles with their sealed evaporative emissions fuel systems don't care how much gas you keep in the tank. The only factor that comes to mind is that fuel loses it's ability to combust efficiently over time, but you'd have to park the car a year at a time to worry about that.

Run however much you want to run in it.

[Clayton1984]

You should fuss over optimal tire pressure instead of whatever too small to measure benefit you could sustain by trimming 30lbs of gas.

Have you considered loosing weight?

[skullhuntre]

Originally Posted by Clayton1984

You should fuss over optimal tire pressure instead of whatever too small to measure benefit you could sustain by trimming 30lbs of gas.

Have you considered loosing weight?

=p yeah i weigh about 150, try to keep the tires around 28 PSI

[ilovecorollale]

Parking in the shade would help and refueling when its cool...like in the morning or night time.

[Bdub215]

Originally Posted by skullhuntre

=p yeah i weigh about 150, try to keep the tires around 28 PSI

should bump them up a bit. i find the car rides better. and i get a extra mpg or 2 i keep mines at 35psi.

[bail_w]

I kept mine at 32 psi, nice and comfortable.

[01loadedLE]

You should air the tires up more than 28lbs like others have said as that is causing more friction against the road which could be causing a loss in mpg, plus the car acts very sloshy in turns that way too. I keep my tires at 40lbs and the steering response is much better than when I used to keep mine at 32lbs.

You can try letting the tank go near empty then filling it up to a quarter tank (3.25ga) and see how much that improves mileage since there will be around 60lbs less weight on the car that way compared to a full 78lb 13ga tank. Don't worry about running empty on your 100 mile drive since there is a 3ga reserve once the low fuel light starts popping up.

[Buurin]

Like others said, 28psi for tires is TOO LOW. Owner's manual recommendations is the absolute minimum. Those who really care about saving gas pump it to the maximum on tire sidewall.