So this got me a little worried. Read the following:

https://www.rx8club.com/series-i-tech-garage-22/renesis-engine-issues-finally-identified-138114/

A few weeks ago I drove 263 miles to Hebron, OH, from West Lafayette, IN. I was gonna attend a RallyX race.

It was mostly highway mileage, and I didn't stop at all once the journey started. I started at a gas station, where I pumped the 8 fulla 93 octane fuel (the gas station was a Marathon station, where they used STP additives. Don't know if this matters, but let's be scientific).

Made it to the venue with 1/4 of a tank left (shows on the dial).

The 8 has a 12 gallon tank, which means it ate 3/4 of 12 gallons of gas, which is 9 gallons.

263/9 =~30MPG.

WTF???? Did my renny finally eat an apex seal or something?

 

fail - that is NOT how you get a MPG figure .
Go away and come back with a proper number

 

WOW! u must have a newly updated motor in ur 05. Maybe urs was a test monkey for somthing special call mazda and let them know how they did. =)

Fuel Tank ---- 15.9 gal.

 

15.9 gallon tank.

you have to fill up again to know how much fuel you actually used.

 

You should know that the gas tank gauge is know to be mostly innacurate and varies wildly between 8s.

The first quarter on mine is gone after 30 miles, and the last one can last a good 100 miles.

My personal record is a little short of 280 miles on a full tank. If you haven't refueled since then, I suggest you wait until the "low gas" warning light comes on or even better if you live near a gas station, wait until the fuel pump starts whining. Then you'll really know.

 

What are you guys talking about? I thought our car was a V6 with a 9 gallon tank that runs on canola oil?

 

i get about 213-215 miles after afull tank of gas.....but i do drive heavy footed, n my oil is horrible...i hate it...but the 8 compensates for it so whatever....just drive n shut up

 

Fail

 

Gasoline is over rated.

 

 

You guys crack me up hahahahaha. I have never gotten over 340 km a Tank (that was running it BONE dry)

 

I get about 140 miles to a tank when I can't keep my foot out of it......
<Which is most of the time>
I got 22 Mpg following a State Trooper on the way up from West Palm.....

 

Not really how a person would go about determining gas mileage.

If you have ever noticed, the first half always seems to last forever, then the other goes really quickly.

 

my first half goes fast......and the second is even faster!

 

Lucky you... a Trooper escort. I had one of those this morning coming in to work. Really put the dampener on the drive this morning.

 

Lol..., I always thought it was 12 gallons, since when I fillup with the empty light on, it goes to 12.38~gal.

Anyway, this thread is now redundant. I'll go try some other means of finding mileage.

 

The easiest way to do it:

1) Fill tank full with gas and reset trip odometer
2) Drive it regularly till the light comes on
3) fill it full of gas again, remember this number


So using the number on the odometer and the number of gallons we put in we now have an estimate of the gas mileage.

so

240 miles/13.52 gallons put in = 17.8 miles per gallon

 

Of course, one reading isn't accurate at all, so its best to take the average of 4 tanks of gas or so.

 

I'm guessing you rode the little bus to school in your youth.

 

Been keeping my mileage data religiously for the past 18,884 miles.. Overall average 16.15 mpg (lots of city driving). Highway average 19. Max 21.7. Min 10.21.

 

If you want to know your mpg, you have to keep track of a few things. First fill-up your tank (Fill-up #1). Drive. Continue to drive until you want to calculate your gas mileage (Miles Driven). Fill-up the car again (Fill-up #2). Now divide the miles driven since Fill-up #1 by the number of gallons from Fill-up #2.

MPG = [Miles Driven (miles)] / [Fill-up #2 (gallons)]

Using this manner you don't even have to use a full tank, rather start with a full tank and go as far as you want. Fill-up....repeat!

Hope this helps.

edit: I see static beat me too it. Nice simple explanation Static.

 

lol... there is always a cushion after the light is on. for our cars is at least 2-3 gallons more...

 

You can drive a couple of gallons past the light, but you'll never get it all the way down to empty.. From what I hear the car will stop running after using around 15 gallons (.9 left technically)

 

Best I've made was 320mi on single tank Usually average around 270 or so though.

Yup, thread seems kind of :/ now that the problem has been resolved

 

skeet skeet ...thATS what i say to troopeeerssss they piggies