ken-x8

According to Mazda the burn marks are irrelevant. Check this out for the actual test procedure:

http://www.finishlineperformance.com...16-07-1793.pdf

Ken

Rotary-RX8

iTrader: (1)

Yea 280 sounds very low. I usually get at least 340 when the light comes on. What rpm do you usually shift at? It shouldn't be that low unless you're redlining every shift.

Bluerenesis

I was getting about 13.5 mpg with bad coils (really bad coils)mostly city driving. Now with those fixed I am getting a little under 17mpg mostly city.

lds01

Usually shift around 4000; has a shift buzzer that sounds of at 5k. Will take it in to the shop for a look at the coils. Thanks y'all!!! ...Leslie

lds01

Thanks for the advice all! Now my heater is not working or only works sporadically. Will be blowing super hot then switches to super cold. W T H???

rees

gas milage


Posted From RX8Club.com Android App

markcanderwich

Hi all..
one of ma frnd has same problem. he is also tired to fill daily fuel in rx8..
ur help would given final change.. thanks all..!!

markcanderwich

I agree with Rotary-RX8..!@@@

Loki

iTrader: (1)

Thanks for the update, glad you made it in time.

csnellin

I bought my car about a year ago (2009 Manual trans, 66,000 miles). I have been keeping very precise records of the mpgs and they have been very consistent (best 15.79 mpg, worst 13.65 and average 14.87). Most of that has been city driving but the best mpg mentioned above was all highway and still I could not clear 16 mpg. This seems very bad when I compare to other RX-8s on fuelly.com
The car seems to have full power and revs easily to 9000 rpm redline. I have changed spark plugs, ignition coil, air filter, none of which had any impact on MPGs. Any other suggestions beyond mas air flow and cat?

wankelbolt

iTrader: (21)

This thread may be useful: https://www.rx8club.com/series-i-tro...plaints-51233/

Which came from here: https://www.rx8club.com/rx-8-faq-9/f...47/#post911737

Ivan2terrible

274km on Half tank

csnellin

So since my last post the situation has changed dramatically.
I changed coils and air filters and continued to get the same mpgs (+/-15 mpg) during city driving. This went on for two full tanks, all of which was city driving. Then I went on a weekend trip and drove 200 mile on the highway. I got 17 mpg for that trip, which, not great for this car, but better than I have ever seen for the car since I bought it. Then weirdly enough the next tank of gas, all of which was city driving, I got 17 mpg again. Then I did another long road trip and got 22 mpg.
Does the computer and or engine need some time after a coil and/or air filter change to adjust? Anyone else seen this kind of delayed change?

wankelbolt

iTrader: (21)

That's a nice improvement and more in-line with typical MPG. While it's probably not the whole answer, the short answer is yes. Did you pull the negative battery terminal when you were doing the coils? You should for safety and because it resets the ECU.

Ivan2terrible

so basically my 520km on a full tank is pretty good i suppose........

Loki

iTrader: (1)

Yes. Have a cookie

So what are your driving habits like to get that kind of mileage?

csnellin

wanklebolt, yes, I did remove the negative cable during the coil replacement, so that should have reset the computer at that point.
Ivan2terrible, how many gallons are you putting in after 520km? Unless you are running the tank dry, that seems like unbelievable mpgs.

Ivan2terrible

[QUOTE=Loki;4722599]Yes. Have a cookie

So what are your driving habits like to get that kind of mileage

its has to do with the traffic i have to follow to work, i suppose.. i never get past 120km/hr, always in the 115km/hr, and constantly have a vehicle in front of me.. i never change @ high rev, when on road is clear, i push to 6000rpm, in between the morn or evening on my way home

Ivan2terrible

its almost just about finished and on the last or 2nd last mark, light blazing..i think it was 57l i filled

Loki

iTrader: (1)

57L on a 60L tank... you like to cut it close
Is yours a 5 or 6 speed?

wankelbolt

iTrader: (21)

Amateurs.



I was still running and made it to the gas station. IIRC put in 13.something gallons. Done this more than once.

Ivan2terrible

5speed Loki..