Confirmed my city mileage is 11 to 13mpg in Chicago. The RX is a gas hog in the city.

 

I have only monitored a couple of tanks so far, just got the car (07 6500km), 14.1mpg on my first tank, and 15.5mpg on my second. The second tank did have premix. Probably 15% highway, 85% city. Driving like I stole the thing 50% of the time.

For only getting approximately 300km a tank, it felt a lot longer than my old car. 01 Grand Am GT. I am attributing this to the fun factor.

 

I have a 2009 automatic and got 22mpg on the first tank and 21.5 on the second tank with 80% highway and the a/c on.

 

New 2008 40th Anv. 6 speed, with 1,300 miles. Did a three hour trip at sustained 74-75 mph
through WI I-94. Two people and luggage...total added weight about 350 lbs.
23.3 mpg using 92 octane.
This was way better than expected especially on a new car with such low miles, and running 5W-20 dino oil.
I love this car!!
Kim

 

after a lot of research, and analysis, i've come to the conclusion of our crappy mpg..

and that is...

our cars are too fun to drive :P

if we had good mpg, then it'd be too good to be true

 

Hey need help. Without me taking the Rx8 to the dealers, can someone tell me why my Rx8 is consuming a hell of a lot of fuel even when im trying my best not to floor it and stay at the legal speed limit of 30mph (United Kingdom). I have fuelled the car to the max drove it sensibily and it drinks like a horse. Been to a few garages and have been told allsorts. Please help

 

Please give us the history on your car, year MT/AT,miles etc just anything you can add... The service it's had parts replaced. Give us the numbers on your next fill up or two and well do the math. Most people get 14-16 in city driving.

 

Registered October 2005, Manual Transmission, 231 bhp,

Serviced by dealers;
26/06/2006
11/05/2007
21/04/2008
28/02/2009
12/02/2010 most recent service (air filter, oil change, spark plug change, oil filter)

2 Weeks ago had the throttle body cleaned, Maf sensor, which got rid of the low idle an shake.

Full Fuel tank filled rite up to the top, gave me 300 miles at 80-85 mph average speed. on the motorway

half a tank gives me 70 miles, was average of 100 miles. so a massive change there differance of 30 miles.

is there any other info you require thanks.

 

Last three fillups:

1) 47.6731 L @ 1.039 / L - 383.4km ---> 12 L / 100km (19.6 MPG)
2) 48.9240 L @ 1.009 / L - 437.7 km ---> 11.1 L / 100km (21.19 MPG)
3) 46.2020 L @ 1.019 / L - 444.5 km ---> 10.39 L / 100km (22.637 MPG)

Fill #1 was on Co-Op Premium Gas, Fillup 2 and 3 was on Shell V-Power. Mostly highway driving on all 3 and softer driving (less zoom zoom) on #3.

For me, gas vendor (Shell vs Co-Op) seems to be correlated with gas mileage.

James.

 

I have an 2004 rx8 gt and i get 200-230 to the tank and i have heard turboed cars getting that, my question is what can i do to up that? I've replaced coil spark plugs wires, so what would be left? fuel pump? i have around 62k miles and ive owned it since 29k. Thanks guys

 

My best mpg pure highway was 20.8. My worst mpg pure city driving was 12.8.

http://www.fuelly.com/driver/silver02tdi/rx8

 

I usually get about 10mpg driving around town (in winter) but yesterday I picked up a friend from the airport and it did about 26.6 mpg! I was very surprised. this was all highway tho, I was on I-65 doing between 80 and 95 in sixth.

 

On the 3 fillups we have done on my wife's new 2010 AT, I have averaged 20mpg each time. Premixed. 1100 miles so far. I live on an Army post, so much driving is only 30-40mph, with some trips into town at 65mph or so.

At least one redline trip per drive to keep her happy.

 

Date Miles Gallons MPG
3.3.2011 130.6 6.837 - 19.1
28.2.2011 108.7 5.812 - 18.7
27.2.2011 124.3 6.604 - 18.8



in reykjavík city iceland

 

I was getting 200-240miles on a tank when I first bought my 04 6speed. I replaced the plugs and wires within a few days or getting it. It had 28k miles on it at time of purchase. Had the cat replaced under warrenty due to a cat efficeincy code, started getting 240-260miles per tank. Then decided to replace the coils...

First fill-up: 279 miles
Second fill-up: 293 miles
Last fill-up(as of yesterday): 309 miles

The plugs and wires are OEM NGK. The coils are, dare I say it, Duralast! Yes AutoZone coils($24ea.) and I'm getting over 20mpg. Car has 35k miles on it now...Anyone else seeing these kind of numbers???

 

http://www.fuelly.com/car/mazda/rx-8

270 cars, 1.5 million miles covered so far. Probably the largest set of data available.

Bell curve is centered on 18 mpg.

 

I have been getting 16.5 mpg in my 2004 MT at maybe 60/40 highway/city. Last week I pulled the back seat cushion to get at the fuel pump to check the filter sock (just for fun) and found that the plastic outlet fitting was cracked and leaking quite a bit of gas. Yes my car has always had a bit of a gasoline odor at times but I am used to that having owned several Miatas

So, I replaced the entire fuel pump assembly last week and it looks like my car is headed for 20+ mpg. The car really runs great and I changed the plugs wires and coils and repaired vacuum leaks when I bought it so it has always bothered me that I could only get 16 mpg. I drive the car hard with lots of high rpm operation just for engine health of course

If anyone has the combination of low mpg and some gasoline odor I recommend taking a look at the fuel pump outlet fitting. It's easy to do, just pull up on the front of the driver side back seat bottom to remove it and remove the cover plate (4 screws) and it is right there on top of the gas tank. Be sure to put out whatever you are smoking before doing this!

Cheers!