I8U

iTrader: (1)

89 from BP.




Yeah surprised how slow your driving! LOL!

Razz1

Wait until he finds out that he carboned up the engine and he needs a new one.

The rotary is meant to Run at 8k at least once a day.

swoope

iTrader: (5)

i have never spent anytime on a long cruise above 74 mph.

as at 76 mph is where the cat saving goes a bit rich trick happens.. i might give it a whirl just so i can fail.

beers

kvndoom

It's hard to drive this car the way it's meant to be driven and get good MPG. Fuel economy and The Beep are mutually exclusive.

Isn't this in the wrong forum anyway? I was half expecting this thread to be a spammer pimping fuel line magnets or throttle body spacers.

rled

Lots of things contribute to fuel consumption. The weight of the car, size and tread design of the tires, (some tires have less rolling friction), temperature, humidity, barometric pressure, wind, road condition, style of driving, ect. When you accelerate from any speed whether it be from stopped or in motion, the fuel required to move your car is directly related to how fast you want to reach a certain speed. Accelerating moderately to speed will save fuel. If you mash down the pedal hard and shift at 3k rpm ,you are using more fuel to reach that rpm than you would have used if you had eased into it. I see people all the time sitting at a stoplight . When the light goes green they zoom by me only to jam on the brakes at the next light. Wastes fuel! I don't drive like a granny , but I don't fly around in town. I blow the soot out after I get on a road that allows it. My car has 64000 mi. and I average 280 mi. from full to the fuel light. I have always used 93 octane with 4oz of mmo. Incidentally my car runs better now than when it was new and gets much better fuel economy. My 2cents worth. cheers

kvndoom

The Google ad that was at the bottom had the answer all along:

http://fightfuelcost.com/index.php

Complete with testimonials! If it's on the Internet, it must be true!

StealthTL

iTrader: (1)

This guy is a genius!

Why didn't any of us think of doing that?

Moved to the DIY forum, to school future generations of ownerz.


S

rotary.enthusiast

Might want to try replacing your front O2 sensor I did a ~500 mile interstate road trip and got ~23 MPG averaging around 80MPH. If traffic flow had been more consistent and I would have slowed down a little it probably would have gone up. Also, I get around 20 MPG on my average tank... I do a lot of highway driving, but when I'm not on the highway I drive it hard

I8U

iTrader: (1)

I really just can't be the only one experiencing 25+ mpgs on the highway. I just checked my mileage on this most recent tank and averaged 19.8 with mostly city driving. I don't baby it by all means...

swoope

iTrader: (5)

it is pretty rare. i have been lucky. i have usually averaged over 20 mpg since i have owned the car.. 95k miles.

best i have done is 24 mpg.. worse is 18.

robling road. 9.3 mpg..

year mileage mods ?

beers

AJ's Shinka

I have been getting these numbers with the Accessport. It's not the best gas mileage out there but it's great for an 8.

raphy3

^ Wow I didn't think about that. Actually using the accessport to get better gas mileage. That would be a pretty good justification for the price by itself.... Hmm maybe I'll try that if I can find one on sale.

I8U

iTrader: (1)

It's an '04, on it's 2nd motor...the first went out @ 36k and I have about 30k on this one. Only mods I have are listed in my sig. I will be doing some fuel system mods and some cooling mods but will not be able to list them exactly, as they are trade secrets of ROAR's.

TeamRX8

iTrader: (25)

I get 3 autox runs per gallon

I8U

iTrader: (1)

swoope

iTrader: (5)

yes the roar tank mod is a great deal. just shipping now kills it!

you using an ap? btw, i am on my second motor. my mileage is slipping. will be interesting to find out what it is..

and good luck with the tranny.

beers

psychodad

I've found it easy to get 25 mpg in mine on highway trips.

As for keeping it under 3500 rpm, I didn't buy the car for that.

I8U

iTrader: (1)

I hear ya on the shipping...good thing I'm only 3 hrs from the shop! As for your question about the AP, I am not using one as of yet...probably my Christmas present though.

And the tranny project has run into a snag...I think I may end up working with our tranny guy and crew chief and either mod an existing tranny we have or find a trashed one and rebuild that. I can't see myself spending 3k for Mazsports offering though.

StealthTL

iTrader: (1)

I tried the Economy map on an AP....

Didn't even run one tank thru, before I took it off - it's horrible, gutless slow and nasty. Definitely took all the fun out!

So I guess I'll never find out how 'economy' it really is....oh well.

S

User24

iTrader: (1)

No that is impossible. Add 5 miles to your entire tank, yes. Add 5 miles per every mile you drive, no.

Once again to repeat my scientific rotary tests, I forced myself to drive with slow acceleration. Nice and easy, no redline, just slow as hell like a mid 90s Camry automatic. Got 47 miles for quarter tank, when usually I get 43 by driving like a demon. Do the math here.

4 miles extra per quarter tank means 12-15 miles extra over the course of the entire usable tank. With mpg at 14, I've just saved a gallon of gasoline before fill-up, and paid myself about $3.50. That is, paid myself $3.50 to drive just like a slow *** Camry from 1995.

Doesn't make sense. I'd have done much better than paying myself $3.50, by just buying with cash a cheap $500 car instead of financing rx8.

Once again, the cold hard math and rotary logic breaks down all these "dollar saving" measures.

RIWWP

iTrader: (2)

Agreed. I ignore gas mileage. I bought the 8 to have fun and keep a smile on my face, not win the MPG X-Prize. I have played around with MPG a few times, to see what variances, both high and low I could get, mainly on long MD<->RI trips. Best is 24mpg, ~75-80 miles per quarter tank, worst is ~18mpg. I seem to get better than most, and the Beep is part of my regular sound system, so I'm no granny.

I even played around with 87 octane a bit, but while it technically runs 'fine', I wasn't happy with it. The butt-o-meter felt a drop in power, and i swear it felt slightly rougher. More vibration etc... No CELs or anything, but instantly happier when I switched back to 93. The extra $2-$3 saved per tank is not worth it to go with 87 or carbon-caking your engine.

Or another way of putting it... I will -GLADLY- pay an extra $2-$3 per tank to have this much fun!

And I get an insane amount of pleasure knowing that my engine loves me for it too.

RX8Sinner

ok ok ok, so my 8 is my daily driver. I switched from a '94 Saturn SC2 which I was getting about 40 mpg highway. Yes 40!!! Now around town/city I get about 17 mph, and I drive to school 60 miles away on the highway. So i round trip about 120 miles per day. The 8 on that trip to and from school I average roughly 20-22 MPG. Thats not really saving much money. And thats at 80 MPG and hauling *** onto the highway from the onramps and after tolls. So I still get my fun out of the car as well. I've tried driving conservatively and seems I get WORSE gas mileage when I do. Seems I get best mileage at around 4k RPM

kersh4w

iTrader: (3)

i get 25mpg on the highway if i use the economy mode with the AP.

generally i average around 19mpg, i blow away from stop signs, stop light gran prix and all. i do a lot of highway miles, usually in excess of 80mph, quite a bit in excess. and several WOT runs to the top of 4th and into 5th per tank. i think 19mpg is pretty damn decent for the way i drive.