415 miles today!

[UberSilver]

Went from Oakland to Reno and back on one tank! took 10.5 gallons to fill, with an average speed of 64 mph. So 39 mpg.

All readings off a GPS.

[Kaotic Lazagna]

Not bad (really good actually), especially with those hills/mountains. lol. You should get a Scan Gauge II. It'll be very beneficial. Also, I don't recommend letting your gas tank fall below 2 bars. I let my tank get down to the blinking bar, and I kid you not, my mpg's went from 42 mpg to 29 mpg for three tanks, and then started climbing back up. I think some low laying debris got sucked up???? I never let my tank go below 2 bars now.

[fnkngrv]

Originally Posted by Kaotic Lazagna

Not bad (really good actually), especially with those hills/mountains. lol. You should get a Scan Gauge II. It'll be very beneficial. Also, I don't recommend letting your gas tank fall below 2 bars. I let my tank get down to the blinking bar, and I kid you not, my mpg's went from 42 mpg to 29 mpg for three tanks, and then started climbing back up. I think some low laying debris got sucked up???? I never let my tank go below 2 bars now.

Good advice as if it ever came to having to get into the tank it is a chore and can get expensive if you need a shop to do it. Great mpg

[UberSilver]

Originally Posted by Kaotic Lazagna

Not bad (really good actually), especially with those hills/mountains. lol. You should get a Scan Gauge II. It'll be very beneficial. Also, I don't recommend letting your gas tank fall below 2 bars. I let my tank get down to the blinking bar, and I kid you not, my mpg's went from 42 mpg to 29 mpg for three tanks, and then started climbing back up. I think some low laying debris got sucked up???? I never let my tank go below 2 bars now.

Thats the only time I've done it. I just wanted to see if I could make it.

I normally fill up at the half way point.

[nookandcrannycar]

Originally Posted by UberSilver

Went from Oakland to Reno and back on one tank! took 10.5 gallons to fill, with an average speed of 64 mph. So 39 mpg.

All readings off a GPS.

That's pretty darn good, considering that it includes climbing from Oakland to Emigrant Gap on the way up and Reno to Emigrant Gap on the way back. The best MPG I've gotten on a tank in my Yaris, if I remember correctly, was between 48 and 49 MPG from Winnemucca, NV to San Rafael, CA.

[Kaotic Lazagna]

Good, good. Let us know if you see a decrease (or increase) in your next few tanks. ;)

[screenprintr]

That's weird. You get better mileage filling up more?

[Kaotic Lazagna]

Originally Posted by screenprintr

That's weird. You get better mileage filling up more?

You should. The theory behind it is you have less weight in the car, so you have less weight/mass to move. Makes the engine work more efficiently.

[bobolinko]

Originally Posted by Kaotic Lazagna

You should. The theory behind it is you have less weight in the car, so you have less weight/mass to move. Makes the engine work more efficiently.

Dude, You got it backassards...

More gas - more weight
less gas - less weight <-Power-to-weight ratio better for fuel efficiency here....

[Kaotic Lazagna]

Originally Posted by bobolinko

Dude, You got it backassards...

More gas - more weight
less gas - less weight <-Power-to-weight ratio better for fuel efficiency here....

I took it as filling up more often (like filling up to half tank only). I should have probably read it twice. I will re-reply to him.

[Kaotic Lazagna]

Originally Posted by screenprintr

That's weird. You get better mileage filling up more?

Since I wasn't sure if you meant filling up more often, or filling up more per fill up, and since I answered in terms of the former, I will answer for the latter now.

Filling up more per tank will not get you better mpg as it'll be adding more mass/weight to your car. I fill up to full because I don't want to have to keep filling up often, so I take that mpg hit. I don't let my tank go lower than 1/4 tank (which isn't really 1/4 tank because the gas tank isn't a perfect square) because in my experience, it did something that caused my mpg to decrease a lot. I'm assuming it's sucking up sediments/debris that settled at the bottom of the tank or something.

[albee213]

I have taken apart several cars and repaired many fuel pumps and seen inside of the fuel tanks and in my time I have never seen anything in the tanks other than fuel. I wonder if older cars used to get crap in them, but anything since the 90's the tanks have always been clean.

[aspro]

Originally Posted by Kaotic Lazagna

Since I wasn't sure if you meant filling up more often, or filling up more per fill up, and since I answered in terms of the former, I will answer for the latter now.

Filling up more per tank will not get you better mpg as it'll be adding more mass/weight to your car. I fill up to full because I don't want to have to keep filling up often, so I take that mpg hit. I don't let my tank go lower than 1/4 tank (which isn't really 1/4 tank because the gas tank isn't a perfect square) because in my experience, it did something that caused my mpg to decrease a lot. I'm assuming it's sucking up sediments/debris that settled at the bottom of the tank or something.

I always drive her until bone dry. Have been doing it in all my cars for the last 10+ years in all kinds of cars from jeeps to super duties (gas) to STI and with my yaris. I have never once had to change a fuel pump and a good half of these cars have seen well over 250,000 km's. I think the theory of sucking up debris is bogus. That or I have been blessed with bullet proof fuel pumps from all sorts of car manufacturers

[nookandcrannycar]

Originally Posted by aspro

I always drive her until bone dry. Have been doing it in all my cars for the last 10+ years in all kinds of cars from jeeps to super duties (gas) to STI and with my yaris. I have never once had to change a fuel pump and a good half of these cars have seen well over 250,000 km's. I think the theory of sucking up debris is bogus. That or I have been blessed with bullet proof fuel pumps from all sorts of car manufacturers

^^^^^This. I don't have much knowledge re fuel pumps and gas tanks, but my habits re when I do a fill up + lack of any issues = similar to aspro.

[why?]

If you do not commonly let your gas tank go to near empty, you should not start doing it, because Kaotic is right, crap sinks to the bottom and sucking anything up could cost lots of money.

I never fill up until the bar starts to blink, and I almost never have to put ten gallons into my car.

[bobolinko]

Originally Posted by why?

If you do not commonly let your gas tank go to near empty, you should not start doing it, because Kaotic is right, crap sinks to the bottom and sucking anything up could cost lots of money.

I never fill up until the bar starts to blink, and I almost never have to put ten gallons into my car.

Just FYI:
Any and every automobile gas tank has the gas taken out from the BOTTOM. The pickup tube might be located on the top of the tank, but inside, it goes down to just about the bottom, NOT Flush, to the bottom, but almost. Think about it! Otherwise, how can the gas get emptied while driving anyway???
Next time, try drinking a drink with the straw half way to the bottom of the glass and see if you can empty the cup.

[why?]

Think about it. acting like an asshole does not make you correct. It just makes you an asshole.

Your logic is flawed. No tank is perfectly straight anywhere. Crap will always fall below the gas level, and unless you run the tank near dry, it will stay there until the car is crushed.

And the Yaris' inner liner is rubber. That means the weight of the gas will always flex the bottom lower.

But most importantly, something believed and repeated by so many people for so long usually has a kernal of truth somewhere. Look at what we call old wives tales. Science is finally catching up to their truths.

Originally Posted by bobolinko

Just FYI:
Any and every automobile gas tank has the gas taken out from the BOTTOM. The pickup tube might be located on the top of the tank, but inside, it goes down to just about the bottom, NOT Flush, to the bottom, but almost. Think about it! Otherwise, how can the gas get emptied while driving anyway???
Next time, try drinking a drink with the straw half way to the bottom of the glass and see if you can empty the cup.

[Kaotic Lazagna]

Originally Posted by why?

Think about it. acting like an asshole does not make you correct. It just makes you an asshole.

Your logic is flawed. No tank is perfectly straight anywhere. Crap will always fall below the gas level, and unless you run the tank near dry, it will stay there until the car is crushed.

And the Yaris' inner liner is rubber. That means the weight of the gas will always flex the bottom lower.

But most importantly, something believed and repeated by so many people for so long usually has a kernal of truth somewhere. Look at what we call old wives tales. Science is finally catching up to their truths.

Well said