Everyone! How Many Miles Can You Go On A Full Tank?!?
 

well this is what i got...70% highway going 80-90...and 30% city driving on a full tank. is this what everyone is getting around? ohh yeah, this is with dsc and tcs on. =) everyone reply. need some feedback!

I get about 200 in the city, but I have a lead foot!!!!

I reguarly get 250-260 miles per tank. 70% city/ 30% highway. I use 93 octane

The most mileage I've ever achieved on a tank of gas was 285. It was on a trip from Dallas to Houston

I get about 260 with similar conditions.

How many gallons is the RX8 tank? I've always wondered.

I've gone 240 miles and filled in 12.994 gallons and the gas light came on about 5 miles before I filled up. That means I still had about 3 gallons in the tank and could have gone another 25-30 miles comfortably.

But I don't want to add my name to the list of 8 owners that have run out of gas so I normally try to fill up after between 200 - 220 miles.

your pushin it at 250.

My yellow light came on last week at 282 miles, I was surprised, because I had not driven it carefully with the intention to get a high mpg.

I calculated 20.5 mpg for that tank.

Since I've had 23.15 as my best number so far, I'd say it is definitely possible to get over 300 miles with one tank.

282 * 23.15 / 20.5 = 318 miles .. and that's when the light has *just* come on. 2 to 3 gallons left meaning another 50 miles..

--> 318 + 50 = 368 miles.

I drive 95% highway and fill up as soon as the yellow light comes on.

Drove to Vermont last weekend from NJ, got 250 at 100% highway, my baby likes to binge drink gasoline like its FRAT BRO.

Usual pattern = 220 miles, 13 gallons, before the light comes on.

Farthest on a tank was 260 miles, 14 gallons (road trip).

Light always comes on at 13.5 gallons for me.

Everyone don't forget to note what octane you are using

Got 235 miles on one tank... once -- but I've yet to do a full highway tank.

Okay, so the gas tank holds 15.9 gallons. How much of that is actually usable fuel? I don't think I've ever been able to squeeze more than 13.9 gallons into the tank. And, I'd swear I was on fumes. Has anybody actually used that last drop? And, if you happen to run out of fuel in front of the gas station, how much fuel did you squeeze in?

Yes, I've done it. 15.3 gallons usable fuel in the tank.

As for how far can I go on a tank -- my mileage varies, but checking my log I've kept since day 1, I see fillups at 351 miles (best), 332.9 miles (when I ran out of gas), and 320 miles.

Usually, I fill up at around 13-13.5 gallons, and based on my typical 22 mpg, that would put a typical tank range for me at 336.6 (15.3 X 22).

I use 93 octane, and my normal commute is 85% highway.

Edited to add:
DSC is always on.

(And to clarify a sentence above.)

i have pushed it to over 300 miles on 3-4 tanks in a row on my trip thru cali (i know i know -don't even speak of miles per tank yada yada). one of those thanks i actually put in 15 gallons to the first stop of the pump. needless to say i was sweating the last couple of miles and my wife was very upset that i almost stranded us. it was 320 and a little more if i remember correctly. the first tank out on that trip i went from portland oregon alll the way into cali to the first gas station i found and that was like 310 miles for 14.? gallons

for those of you who are getting over 250 + miles...do you turn OFF your TCS and DSC??

240....
 

240 miles from full to yellow light.

Doesn't seem to be affected by my speed, and no, DSC & TCS stay on.
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doc

My warning light comes on generally around 220-230. This last tank it was 240-ish when the light came on.

I generally dont muck with the DSC and just leave it on.

I have got as low as sub-15mpg over a 150 mile period, but that was some very aggressive driving (the last SD rx run a couple of weekends ago)

Can someone tell us exactly how far you can go after the yellow light comes on before you run out of gas :p

See this thread. HiX8 says 29 miles.

Thanks, that is good to know. Where I live I can't drive 29 miles in any direction without falling into the pacific ocean :p I think I'd be better off with a life raft in my trunk than a extra gallon of gas :p

I've got 10,000 miles on my car.

see my crappy mpg log.

Re: 240....
 

Agree, speed, DSC, octane, driving style (within limits) don't seem to affect mileage. Stop and go traffic does, so if you're doing city/highway or stop-n-go freeway you'll get less mileage than hiway road trip of a few hundred miles.

My warning light comes on before 220 miles, and I always fill up by 220. I religiously get 16.5-16.8 mpg regardless of octane, DSC/TCS, or driving like grannie. EXCEPTION: If you followed my long saga here I've filled up and calibrated twice since getting my car back. First tank, I drove to LA and back and got like 19.1 mpg, a near-record for me. Second tank was all local driving and got 17.1, which is extraordinary. This is on 87 octane. Nothing I've ever done has ever caused me to waiver from the 16.x mpg until my last two tanks. Two things happened: All the maintence done in the thread above which included replacing the clutch and associated parts. Plus I went over 10K miles almost simultaneously. Maybe my luck is about to change...

I can go just sky of 600km in a full tank in the freeway. More if turn off the DSC

I do 100% city driving all the time and I get 230 - 240 miles a tank. Thats w/drivingdown allthe way from full to the very last E mark after the light has come on. I usually get the lightbetween 205 - 215. When thegauge is on the 3/4tank mark I have between 50 - 60 miles on the car. The onlyway I can get 250 - 260 out of a tank in my Rx8 isif I do at least 20% highwaydriving. My car has ~5500 miles on it now. The EPA should have listed 16 for city mpg becausethats the best I can get even if I keep the car under 50 from full to low.

I just 12.5 mpg all city.

Usually I get 14 city and 17 maybe 18 highway.

I'm think I am going to have it checked out.

Is anyone else getting this bad a mileage?

somone was saying somethng about getting their 8 taken back under lemon law awhile ago because of low mpg and this was posted. if anyone else still has their window sticker go read it.

Cant takeit back for that b/c you do get 15 mpg sometimes. They justbarely made it

mine is not consuming is sucking gas..:) but i still Love it..!

My warning light comes on at 200 miles. It runs out of gas at 227 miles.

My RX-8 consumes gas so fast, I can actually see the needle move.
I was doing some 3rd gear tuning pulls for the E-Manage on Thursday night and after each one (about 20 seconds at WOT in 3rd), the gauge was a little lower.
When I was done for that session, I had driven 35 miles and a full tank had dropped to just above 3/4.
I'm at 3890 miles and I will fill it tomorrow with tank number 22.
That works out to 200 per tank, 13.8 gallons per fill.
14 MPG.
Tank number 5 or 6 was highway ONLY and it made absolutely no difference.

I said the exact same thing to a friend and he said I was crazy but I swear it does move when you're watching it.

I routinely get 270 per tank (mostly highway since this is my commute car). But, driving hard on a windy grade I've used just shy of a quarter tank in just over 40 miles. I think the EPA numbers are probably best case for my 8. If I get into it, it will be less (sometimes much less). Kinda what I expected.

I noticed MPG going down slightly, but I think it's because I'm more comfortable driving it harder. My last reading was 14 MPG. I drive in strictly stop and go city traffic. I average between 14 and 19 MPG city, dependent upon my driving habits. I have to say I didn't buy the car for economy but, rather performance and handling. I'll take this car any day over a car that's less exciting to drive and offers 10 MPG more! On the other hand it seems that Mazda slighted us twice by programing the car to run rich for EPA concerns and as a result gives us less power and worse fuel economy. Mazda would do right by offering us a high flow high heat catalytic converter,or offer a new cat periodically untill warranty ends and reflashing back to it's original parameters. This would make the EPA and consumers very happy, and one, in which from a consumer standpoint, we earnestly deserve!

I don't measure by tank (I find per gallon to be more accurate), but here are my early results:

First tank (Under 300 miles) 12.8
Second Tank (Highway Driving) 16.5
Third Tank (Spirited Driving up & down mountains) 16.9

With any luck the trend will continue. I was very surprised to see 16.9, considering I was in the mid to upper RPM range quite often.

I find that 3 tanks in I am doing about 220 per tank. The problem I find is that at my regular motorway speed (92 Mph) the revs are running at 4.5k so I guess I am never going to get great milage. Just to make any americans feel better about themselves it cost me £43 ($76) per refill.

Still I didn't buy it for fuel economy..

I've been keeping track of my mpg and i'm getting around 15 to 16 miles per gallon. I've got about 8000 on my 8 and everytime my light comes on around 200 miles when i'm driving back and forth to work but when i drive back and forth to MD the best I got was about 240 miles total. But even though the MPG suck I still love the car.

I normally get 210-220 mostly city, filling up what I guess is right before the light comes on. Though on my trip from Florida to Buffalo I would consistently get 305-315 (usually 80 miles per 1/4 tank mark) keeping the cruise at around 80-85. I've heard that cruise control can help mileage a lot, but I have no sources to back this up.

Well on this last tank i really let it rip. 1st 2nd and 3rd gear redline shifts when ever possible. no running in 6th gear, usually staying in 4th even at highway speeds just to play with the power available above 5 k.a few times running in 5th on the highway at 65-70 mph. 173 miles on 14.18 gallons for my lowest mileage ever on this car- 12.2 mpg!! hehehe. it was alot of fun and worth every penny :) so on this tank i am going to shift no later than 3500 in each gear and try to get to 6th as soon as possible every time,so at about 45 mph and above. ill let you know what i get this time.

i noticed that my mileage stinks during the first half of the tank of a gas ie from Full to 1/2 i can literally see the needle move and my mileage is awful. Then from 1/2 to E i dont see as dramatic a move in the needle and i seem to get more mileage out of that portion of the tank. I dont drive any differently throughout the tank.

i also notice that when i am at Full I get a pretty good move of the needle from the F indicator within a 10-15 miles or so.

Most all of my driving is city driving.

Is it possible that the measuring device for the fuel is not entirely accurate?

Anyone else notice this?

Well, the fuel level sender on every vehicle is often not accurate over the full load of the tank.
However, it is usually backwards from the way that you are relating the experience you are having with your gauge.
Typically, the first half goes slowly and the second half much more quickly.

Mine is similar to yours in that the first 15 miles or so makes the gauge move about 1/8 right away. The movement is perceptible if you watch the gauge long enough instead of the road.
Another 25 miles and it is 3/4 full.
It takes about 100 miles to get all the way to 1/2 and the light comes on in another 100 miles.
The car then runs out of gas 25 - 30 miles later.

We, too, have noticed the action of the fuel gauge is not linear, and that it drops more quickly during the first several miles when compared to those nearer the end. We can live with that, but it was a bit scary when we didn't know what fuel economy to expect. Reports of 13 and 15 mpg had us worried. We can happily report, after 1,000 primarily city miles, that we have averaged 19.9 miles per (U.S.) gallon.

250

260

You should have filled up in Ashland -- gas always seems to be cheaper in OR than in CA, even though it's not self-serve. Go figure?
But it's good to hear that a 300 mile range is not out of the question, since that is usually where I like to stop (300 miles north of home) on that trip.

I'm sitting very low now at 240. Gotta fill her up after work.

Picked my RX-8 up on the 10th of January, drove it in city only, it had 800 miles on it when I got it. Went 210 miles, was running on fumes cause I put 15.14 US gals in the tank. All city, almost all fun, had to see how it accelerated when possible. MT, DSC on assumed premium gas was used by dealer and they filled it up (Showed full at drive off). I knew the mileage would suck this tank, expected it to and didn't care that it did. 13.9 miles/Gal that tank.

Took it out for a road trip with 90% highway, averaging 72 MPH in 6th, filled up with 12.3 gals and went 215 miles to get 17.5 miles to the gallon.

Not that I am expecting this to be economical on fuel but I expected at least 20 MPG on the highway. My 6 cyl. Dakota averaged 14 city 17 highway so it's better mileage but a whole helluva lot more of an enjoyable ride. Our "pracical" vehicle is a Honda CRV and it averages around 20 overall with little more on highway only.

I didn't get this car for fuel economy I got for my Need to Speed, or at least to launch fast! So, all in all, I am getting about what I expected.

yeah you are right ashland would have been cheaper but at that point i still hada bunch of gas in the tank and i just had to see if i could make it over into cali and over the 300 mile mark :D my wife was bugging me about it tho cause she could see when the light came on and we were just outside of cali with a ways to go before that gas station. im just happy we made it:)

212-220 miles on a tank for me.

I have gotton 250 at the most

I never go more than 5 miles past the gas light coming on. It's usually around 13.4 gals to fill and my trip meter is around 180. I must really have a lead foot... oh well... it's all good. Zoom Zoom Zoooooooooooom! Oh... 91 octane Mobil/Shell/Sunoco