I just took a long early morning trip and turned around and came back with the a/c on most of the time. I had the cruse control on 55mph most of the time and the fuel lite came on at 398 miles. I pulled into a gas-station, I was pleasently shocked $2.95, best price I've seen in months. It took 13.5 gal so my new best is 29.5mpg, bettered all previous seven rotarys and more HP too.

 

When are people going to learn.........

You can't measure MPG by tank full.

Must be a lot of Math flinkies on this site.

 

who's measuring MPG by the tank? we're measuring range, which is MPT.

 

Thanks for the math lesson. We'll be sure to defer to you in all future discussions on this topic.

People who give "I regularly do XXX miles per tank" are giving useless info (we need MPG info, people!), but someone like oldrotor who gives miles on a tank AND gallons consumed is helpful.

Nearly 400mi on 13.5gals? THAT is impressive.

 

Sure is

But I like Dominions boobie pictures better

 

You know come to think of it, I usually put in 87 as well. However this tank I felt like spoilier her a bit, so I mixed half the tank with 93 and half with 87. I wonder if the extra milage is worth the extra gas cost. Somone with math skills should formulate that. I have no time.

 

When starting this thread I wasn't looking for exact science, more hey look at me I never got over 300 miles per tank before. However if you want science I can give it to you. I always fill my tank and top it off. When I filled up again after getting 309. I put 14.8 gallons in the car. I hate math so I'll leave the rest to whoever. On a side note, how far can you generally drive once the warning light comes on. Or for you science guys, how many gallons are left once the light comes on?

 

It seems that MPG varies from car to car. Each RX-8 seems to suck up gas at its own rate.

 

That warning light is something that is probably more variable than anything else, at least from car-to-car. Heck, even from tank-to-tank. Mine came on once when I had about 2gals in the tank, yet another time when I had about 3gals in the tank. I trust the needle more than the light, and the light doesn't always come on when the needle is in a specific position. At least it hasn't in my case.

That's about 20.9mpg, btw, on your 309mi tank.

 

my best 14 gallon tank was 328miles.(23.4mpg) But my average tank (13.5) of everyday driving is about 170-190 (12.6mpg)

woo expensive to drive car

 

thats right the light comes on at a calculated point. not a specific spot on the guage. it calculates somehow from load and fuel used

 

no that is driver to driver not car to car

 

^^yeah what he said...the fact that my car in everyday driving does 13mpg and in pure highway driving at 70mph can do nearly 24mpg just says something about my driving style...i have fun with my toys.

 

Riddle me this. I am in an '04 6spd, and I am getting nowhere near 310 miles to a tank. Possibly because of traffic while going to work, but I try to avoid it at all cost and keep it in 6th most of the time. I am using synthetic oil and 93 octane. Any ideas on why I am getting 230-240 miles to the tank? Fill me in PLEASE!!!

 

what RPM were u shifting at to get 310? and, what type of driving? we need details- all the pertinent info please, as specific as possible...

 

Dammit, these "XXX miles per tank" isn't helping here, people. We don't all fill up at exactly the same point. Keep your receipts and write down your mileage. Takes just a few seconds.

FWIW, on my last fillup I did 14mpg more or less on the nose. That is ALL "around town" stuff, never turning a wheel on a road with a speed limit over 45mph (though maybe did a little more than 45mph on occasion, har har har). 183mi, 13.1gals. Filled up a li'l early 'cuz I was going on a highway trip.

But there's my point about miles per tank. I can say "hey, I only got 180 miles on my last tank! Jeez!", but that doesn't tell anyone whether I tanked up with 13gals or 15 gals. That makes a big difference in terms of the actual MPG... I actually did 14 (poor), where at 15gals it'd be 12.2 (really poor), or at 15.5gals it'd be 11.8 (really, REALLY poor).

The difference between around-town and steady highway speed is quite remarkable. On the highway I'm getting 70% better mileage than in-town, which is a greater spread than I would've imagined. I can get the EPA number on the highway, but not even close in town.

 

all "miles per tank" measures is how much the owner likes to gamble -shrug-

 

It was pretty much all hwy driving with the AC cranking. I drove from Albany down the throughway to Jersey and back. I would say that 30 miles of the driving was city driving.

 

Are you using the Fred Flintstone method of acceleration / deceleration?

 

I would go even further and say that any "xx percent city, yy percent highway", or "mostly highway", etc. is all but useless as well. Everyone's city and definition of city driving is different. The RX-8 sucks fuel at idle. Variations in actual "city driving" conditions will make a big difference.

You want a benchmark to compare mileage, try a highway run with little or no traffic, cruise control, at the speed limit, without significant wind or elevation changes. Anything else introduces too many variables and subjective interpretation, unless you've got a dyno set up with the EPA test routines.

 

I must be EBF...

What else are these "pontoons" good for?!

 

My first tank driving home from the dealer on the highway I got 325 miles on a full tank. Now I get about 260-270 city and 290 or so mixed.

 

I just returned from a several day trip through Northcentral New Mexico and Westcentral Colorado where I got 27.43 mpg on the first tank. Speed for this tank were 65-68. Later, on the return to New Mexico via the Interstate where speed was 75-80, average was 24.07. A/C was used about 50% of the time for all travel. Lowest mileage experienced, during a day of mostly highway but some city driving in Colorado Springs, was 23.65.

 

Gentlepeople, I think we have a winnnah.

 

hmm better check with brillo he got 27. xx but i dotn remember the xx and i think elara got a 27.x tank as well

but its damn impressive