Anyone know an estimate of about how far you can travel with the empty light on in an Rx8?? this info could be pretty helpful to me today, so i appreciate any response. thanks.

Without knowing your driving style our replies would not be helpful. But on with the cruise set around 70 you should be able to go about 40 miles more after the light comes on. But I can avg 21 mpg on my 8 which is high.

The light comes on at about 13 -13.5 gallons burned. so figure your MPG times 2.5 or 3 depending on who you believe.

I have personally gone for about 55km (~35miles) with the fuel light on. Then I needed about 60lt to fill up :Eyecrazy:
A couple friend of mine have even gone to about 60km (~40miles) with the fuel light on. But then you are risking a) your engine, b) a veeery long walk :lol:

I agree with Expo, I wouldn't run it much past 40 miles once the light comes on.

As I recall, the light is supposed to come on with about 2 gallons left but that is by no means absolutely accurate. I have filled up just after the light came on and mine takes about 13.5 gallons so that would seem closer to 3 gallons left in the tank. Of course that assumes you could run it completely dry without fuel starvation.

Of course that assumes you could run it completely dry without fuel starvation.

You can.

Anyone know an estimate of about how far you can travel with the empty light on in an Rx8?? this info could be pretty helpful to me today, so i appreciate any response. thanks.

if you're going on some long trip today, put a jerry can in the back... 5 gallons will give you about 80-100 miles of extra range. And turn your 8 into a modern day pinto :lol2:

I've gone another 35 or so with it on.

I guess if everyone is just going to put up a number I'll say my safe number is 50 miles.

I personally did 37 miles after the light came on. My normal mpg is around 17-18. I was pretty nervous during my trip to the gas station. When I filled up, the station pump read 15 and some gallons, which seems odd if our tank is specified at 14.6 gallons (maybe reserve?)...

FS

I'm one of "those people" who figures you ought to burn up all of the old gas before you put in new stuff. 50 miles is my magic number. But I have gotten caught far short of that. When the light comes on, start searching for your favorite petrol.

I personally did 37 miles after the light came on. My normal mpg is around 17-18. I was pretty nervous during my trip to the gas station. When I filled up, the station pump read 15 and some gallons, which seems odd if our tank is specified at 14.6 gallons (maybe reserve?)...

FS

My manual says 15.9 gallons in the tank.

I personally did 37 miles after the light came on. My normal mpg is around 17-18. I was pretty nervous during my trip to the gas station. When I filled up, the station pump read 15 and some gallons, which seems odd if our tank is specified at 14.6 gallons (maybe reserve?)...

FS

Thats because the tank is supposed to be 15.9 gallons.

Good Thread!
I was always wondering this. Seems like the fuel light comes on VERY fast after reaching 1/4 tank.

once i filled up as soon as the light came on and it was 13.3 gallons, which means that there was about 2.6 left in the tank.

40 miles seems about fair

the light comes on before the needle touches E. A bit conservative me thinks.

Reset mileage counter when low fuel light comes on. Run out of gas. Repeat three times. Add all mileage and divide by 3.

And the needles moves a considerable distance past the E line but once it hits that line in moves very quickly.

Either way the light comes on with around 2.5-3 gallons left in the tank.

My manual says 15.9 gallons in the tank.

Proof that my memory is becoming worse and worse... Maybe I'm thinking about my RX7s... :banghead:

FS

i am not sure, so don't quote me on this, but i read somewhere that if you rarely go to E then the farther up the guage the needle is when the light comes on.

if you only run 1/4 a tank at a time (common when i was younger and you only could get a buck or two from buddies) then the light comes on closer to empty.

either way, i get about 15-19 mpg, when my light comes on i figure 10 miles till i'm going to be walking (that way im safe and not risking being stranded)

Reset mileage counter when low fuel light comes on. Run out of gas. Repeat three times. Add all mileage and divide by 3.


LOL! But true.

:rant: Ok this is the way me ole eyes see it .each 1/4 of the tank holds four(4) gallons.
the book says 15.9 and a 1/4 gallon in the tube on fill up.i think it's a 16 gallon tank and most get paranold when the light comes on as a safe measure from the factory(the good ole low miles per gallon fear)
seems to make sense to me as this keeps me from running out of gas.when the light comes on i head for a gas station in less then a 50 mile radius from where ever i am and no problems in four years so far!:spank:

I've never seen the low fuel light come on so what do I know... :scratchhe
I would say 20-25 miles of street driving just to be on the safe side.

Confirmed to absolute certainty (by my need to hoof it over to a gas station with a can in hand or a call to AAA) several times on my car:

CITY:
From full, 50 miles to the 3/4 mark.
Another 50 miles from 3/4 to 1/2.
Another 50 miles from 1/2 to 1/4.
Another 50 miles from 1/4 to "E".
4 miles and the light comes on after "E"
16 more miles and it stops cold.

HIGHWAY:
From full, 70 miles to the 3/4 mark.
Another 70 miles from 3/4 to 1/2.
Another 70 miles from 1/2 to 1/4.
Another 70 miles from 1/4 to "E".
6 miles and the light comes on after "E"
20 more miles and it stops cold.

YMMV...

2.5 x your mpg.

beers :beer:

2.5 x your mpg.

beers :beer:

That sounds oddly familiar...


:beer:

That sounds oddly familiar...


:beer:

i can confirm it is very very close to 2.5, as i have run mine out of gas... more than once...

beers :beer:

2.5 x your mpg.

beers :beer:

Or, in my case 1 x my MPG.

Or, in my case 1 x my MPG.


i find that interesting, but i find your highway #s more interesting... at what speed do you cruise ?

beers :beer:

Between 85 and 105, depending on my mood.

any future fuel pump or filter problems is owners keep letting the light come on?

I don't recommend doing this on a ford fuel pump.

Between 85 and 105, depending on my mood.

i hate you..:puke: that is silly mpg with turbo at that speed.. put a 3.90 gear in and call it a prius..

and you light comes on after the needle hits the E? mine and most others i have seen comes on at to ticks above the E.

beers :beer:

any future fuel pump or filter problems is owners keep letting the light come on?

I don't recommend doing this on a ford fuel pump.

i run mine down everytime... 71k miles one fuel pump..

btw,, my cup holders are not so bad.. i insulated them.. (pretending to care about this lame thread)

beers :beer:

i hate you..:puke: that is silly mpg with turbo at that speed.. put a 3.90 gear in and call it a prius..

and you light comes on after the needle hits the E? mine and most others i have seen comes on at to ticks above the E.

beers :beer:

Yeah, my light comes on after "E".

The higher cruise MPG is due to tuning. I've removed the stoopid-rich CAT preservation mode.

Yeah, my light comes on after "E".

The higher cruise MPG is due to tuning. I've removed the stoopid-rich CAT preservation mode.

did you figure out the trigger to cat mode???

beers :beer:

I came in here looking to see how long an RX8 can run while rollin on ecstasy and found this MPG crap instead...

FALSE ADVERTISING!

=)

I came in here looking to see how long an RX8 can run while rollin on ecstasy and found this MPG crap instead...

Its the driver, not the car.
All night, baby!

did you figure out the trigger to cat mode???


Well, I figured out how to "de-trigger" it.

Its the driver, not the car.
All night, baby!



Well, I figured out how to "de-trigger" it.

not what i asked:banghead: :banghead:

of course you figured out how to fix it... hence you drive an econobox...

beers :beer:

Why, do you want to trigger it? I guess I could do that too...

DAMN THIS THREAD ALL TO HELL. I've always made a beeline for the pump when my light comes on for fear of running dry. Having read a few of these replies, I just KNOW that I will drive a little further and will wind up stranded on the side of the road. Great...thanks a lot. :banghead:

Really, you probably shouldn't run it below 1/4. None of us should.
There is so much junk in the trunk...er...tank, that it all ends up in the pickup screen when you run it down.
It all ends up there anyway, but at least it can float away when there isn't a last-ditch siphon going on as it runs dry.

Really, you probably shouldn't run it below 1/4. None of us should.
There is so much junk in the trunk...er...tank, that it all ends up in the pickup screen when you run it down.
It all ends up there anyway, but at least it can float away when there isn't a last-ditch siphon going on as it runs dry.

yep,

and speed kills. actually it is the sudden deceleration. i am a mad man..

beers :beer:

hey swoope, you live in Orlando right? how much driving on I-4 do you do? how much city and where is your driving mostly done? i'm just curious because maybe you could relate to our location and our traffic.

hey swoope, you live in Orlando right? how much driving on I-4 do you do? how much city and where is your driving mostly done? i'm just curious because maybe you could relate to our location and our traffic.

i live south west of orlando.. exit 55 on i4... i drive 15 miles each way to and from work... 80% above 55mph...

i get ~21mpg.

beers :beer:

i get ~21mpg.

That's pretty decent.

That's pretty decent.

assclown....

:) it is not like your hybrid... i have been going green by getting parts that weigh less....

stupid me.. turbo, + tunning = al gore..... how many carbon credits do you get with one of those hybrid turbos???

beers :beer:

i can confirm it is very very close to 2.5, as i have run mine out of gas... more than once...

beers :beer:



only once so far but most of my fillups happen in pretty short order of the light coming on.i

assclown....

:) it is not like your hybrid... i have been going green by getting parts that weigh less....

stupid me.. turbo, + tunning = al gore..... how many carbon credits do you get with one of those hybrid turbos???

beers :beer:

You made beer come out of my nose! (Paulaner Hefe Weisen.)

I'm only getting 14 MPG in typical driving. 20 on the highway, but I only do that on long trips. On a "typical" 10 to 50 mile highway trip, my speed shoots up and down between 55 and 125, so I don't see any "carbon credits"!

How big is the gas tank really? I ran out of gas with enough momentum to just coast into a gas station. The fill-up took 57 liters. It is supposed to be a 60 liter tank. The outside temperature was about -10C (14F) if that has anything to do with it.

The tank is really 15.9 gallons. What that is in canuck is anyones guess. :lol2:

yep,

and speed kills. actually it is the sudden deceleration. i am a mad man..

beers :beer:

Over all recorded history there has NEVER been any deaths attributed to speed (exceptions: things made in tubs, hotels, or origins from a ghetto). The myth that speed kills increased in popularity once politicians realized how effective they were brainwashing the masses after that whole weed kills thing. In fact speed became demonized shortly after both marijuana and speed were found to give people the "munchies".

In closing, the term you seek is "Sudden Deceleration Syndrome"...A time tested proven killer since the dawn of the universe...

You've just been schooled...time for recess...

60 liters in canuck = 15.850323 gallons in US. 57 liters in canuck = 15.057807 gallons in US. Given that the Japanese talk canuck, I think the conversion was to, rather than from US speak.

Given that the Japanese talk canuck, I think the conversion was to, rather than from US speak.

well played.

I went 56 miles once with the empty light on. I was in some wodded area in PA and I had NO IDEA where I was and the closest gas station was 50+ miles away. After I got to the station, I found out that I had about a gallon of gas left in the tank before I filled up. So either the gas light came on too early or Exxon's 93 octane gas from Phillipsburg, NJ is magic gas. You decide.

How do you know you had a gallon of gas left. Hopefully not by subtracting your fill-up volume from 15.9.

Why wouldn't one subtract fill-up volume from 15.9 to get the remainder?

Not trying to be smart but sounds like a logical assumption.

I love how the owners manual says something along th elines of as soon as the light comes on "GET GAS" lol... no rough guess on how far we get I would say around 40 :dunno:

The tank volume may be less than spec. My tank held 0.8 gallons less than spec on a fill up after running out of gas. Prior to that incident, I too had thought I could have driven further based on what I thought was left in the tank assuming the spec capacity.

Or maybe, just maybe, the pump at the station you went to was incorrectly calibrated?

Should I assume there is a large variance of almost a full gallon in a mass produced part or on a single gas pump as to which I know for a fact can be maunally calibrated as often as a service station should choose (or not choose)?

shortly after the light comes on you still have about 40-50 miles. Be cautious after it gets below the very last line cause you dont have much left

sweet that means i might pull out 300 on a tank someday.

Running a tank empty, Hmmmmm, pulling all the crap in the bottom of the tank to the fuel filters, running the pump, injectors and fuel sensors dry.
What an amazing concept.

well i can verify that when i went to go by everclear from arizona to california, i know that about 20 miles outside of the california arizona border, my light came on after haulin ass on the way to parker, then from there light came on but able to make it to parker n thats 20-30 miles on the arizona side, but then again i slowed it to 45 mph in 6th gear n made it with the light on and with hopes n dreams to a shell gas station where they wash ur windshield for ya too lol.....but yea i would say depends on ur speed n what gear i gota about 50-60 miles.

I did not understand a word of what you just wrote.
Its like the entire story is perched on the event horizon - shifting back and forth in time with no relative "anchor" to give the reader any sort of context.

I did not understand a word of what you just wrote.
Its like the entire story is perched on the event horizon - shifting back and forth in time with no relative "anchor" to give the reader any sort of context.

Hmm if it was in fact on the horizon wouldnt the information simply appear frozen? I mean theoretically you would never really see it fall in...as it approached the horizon it would appear to stretch and warp until it would look like it froze and then vanished...maybe the hawking radiation emitted would produce a legible post...

Mac11 (Sorry, I don't know how to insert that fancy "Originally quoted by....." :

You speak true about the unlikelihood of a mass produced part varying by much, and that a particular gas pump may not read correctly. However consider the following.

We are talking about a 5% uncertainty in a fluid volume. Most drivers and auto manufacturers would expect this to be quite acceptable. I don't think the RX-8 was built around the tank. The tank was built to fit the available space and it came out to be approximately 60 liters. It will be mass produced with high accuracy at whatever the volume is, but companies take liberties with accepted uncertainties. Speedometer readings are usually a few percent higher than true and there is the horsepower issue.

You can get yourself into some real trouble (such as krock1030 almost did) if you believe that you have more gas in your tank than you really do based on past fill-ups. That 5% error rapidly escalates to a 500% error if you think you have a gallon left when in fact you only have 0.2 gal.

For interest sake, let's look at thermal expansion. The coefficient of volume expansion for steel is about 0.0036%/C, for gasoline it is about 0.095%/C (http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Thermal/ThermExpan.html ). Let's say that the temperature difference between the coldest day in Alaska and the hottest day in the Sahara desert is 100C. Then a steel gas tank would expand by less than 0.4% in volume while the gasoline would expand by almost 10%. It's pretty safe to say that for less extreme temperature variations, tank volume changes are negligible, but people in different parts of the world could report 5% differences in the volume or a given mass of gas.

So I may have gotten 60 liters of gas and only paid for 57, but the day was clear and I didn't see any pigs flying. I don't know how gas pumps adjust to temperature changes, but I do recall seeing notes on the pumps indicating that flows were adjusted to correspond to certain temperatures. However I don't know how that would translate into the volumes I pumped that day.

And maybe the tank is 60 liters but you can't get access to all of the gas. But until someone else provides more accurate information, my money is on the tank volume being less than specified. Based on the gas milage I get, I have frequently been surprised at how much gas is supposedly left in the tank on a fill-up. Others have had similar experiences and an earlier post made reference to 'magic gas'.

event horizon

good movie

Mac11 (Sorry, I don't know how to insert that fancy "Originally quoted by....." :

You speak true about the unlikelihood of a mass produced part varying by much, and that a particular gas pump may not read correctly. However consider the following.

We are talking about a 5% uncertainty in a fluid volume. Most drivers and auto manufacturers would expect this to be quite acceptable. I don't think the RX-8 was built around the tank. The tank was built to fit the available space and it came out to be approximately 60 liters. It will be mass produced with high accuracy at whatever the volume is, but companies take liberties with accepted uncertainties. Speedometer readings are usually a few percent higher than true and there is the horsepower issue.

You can get yourself into some real trouble (such as krock1030 almost did) if you believe that you have more gas in your tank than you really do based on past fill-ups. That 5% error rapidly escalates to a 500% error if you think you have a gallon left when in fact you only have 0.2 gal.

For interest sake, let's look at thermal expansion. The coefficient of volume expansion for steel is about 0.0036%/C, for gasoline it is about 0.095%/C (http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Thermal/ThermExpan.html ). Let's say that the temperature difference between the coldest day in Alaska and the hottest day in the Sahara desert is 100C. Then a steel gas tank would expand by less than 0.4% in volume while the gasoline would expand by almost 10%. It's pretty safe to say that for less extreme temperature variations, tank volume changes are negligible, but people in different parts of the world could report 5% differences in the volume or a given mass of gas.

So I may have gotten 60 liters of gas and only paid for 57, but the day was clear and I didn't see any pigs flying. I don't know how gas pumps adjust to temperature changes, but I do recall seeing notes on the pumps indicating that flows were adjusted to correspond to certain temperatures. However I don't know how that would translate into the volumes I pumped that day.

And maybe the tank is 60 liters but you can't get access to all of the gas. But until someone else provides more accurate information, my money is on the tank volume being less than specified. Based on the gas milage I get, I have frequently been surprised at how much gas is supposedly left in the tank on a fill-up. Others have had similar experiences and an earlier post made reference to 'magic gas'.

I am not saying the gas is expanding due to any weather related anything. I'm saying the pump is just reading off. It happens a lot more often than people think.

pull your gas tank out of the car and find out. then go back to the gas station and call the standards comission and find out.

Hmm if it was in fact on the horizon wouldnt the information simply appear frozen? I mean theoretically you would never really see it fall in...as it approached the horizon it would appear to stretch and warp until it would look like it froze and then vanished...maybe the hawking radiation emitted would produce a legible post...

Well, Hawking has started to go back on himself about what actually happens to information at the event horizon.

That post simply lost information.

Or, maybe it never had any...

Yeah I read the title of a paper about a theory which was supposed to replace the theory of hawking radiation...just never got around to reading it yet...got distracted with Heim Quantum Theory at the moment...unfortunately I haven't had free time to finish reading that paper either so I completely comprehend it...usually takes a few re-reads and then math before I can visualize it...

I'm simply desperate to get off this rock...and AAIA2004-3700 looks like the best...albeit fringe chance...

Running a tank empty, Hmmmmm, pulling all the crap in the bottom of the tank to the fuel filters, running the pump, injectors and fuel sensors dry.
What an amazing concept.

Aside from possibly clogging the fuel filter with gunk, can you damage the pump, injectors, sensors, etc. by running out of gas?

My wife did this once about 1 mile from our house coming back from a trip. I already beat her once, but depending on the answer I get she may be in for another round:nono: No, i'm kidding....but really:)