100804 ...... 20 to 21
100849 ...... 17.5 to 23.3
100879 ...... 18 to 20
101058 ...... 18 to 21
101083 ...... 15 to 19 (10% highway)
xx1365 ...... 13
101450 .......15.3 to 19.3 (mostly city to 60% highway, normally around 17-18, just once above 18.4)
102974........17 to 20
103130 ...... 13 to 15 <-- LOW
103727 ...... 17.8 to 22.2
103841........13-20.5 (13 is hard driving, 20.5 is purely highway)
104226 ...... 15 to 17 (city)
105899 ...... 22 to 23
106429 ...... 17.3 to 21.3
106454 ...... 17.5 to 21
106647 .......14.9 to 25.6
107891 ...... 14 to 17 <-- LOW
108583 ...... 18.3 to 19.5
109161 ...... 19 to 21

 

100804 ...... 20 to 21
100849 ...... 17.5 to 23.3
100879 ...... 18 to 20
101058 ...... 18 to 21
101083 ...... 15 to 19 (10% highway)
101212 ...... 21 to 22
xx1365 ...... 13
101450 .......15.3 to 19.3 (mostly city to 60% highway, normally around 17-18, just once above 18.4)
102974........17 to 20
103130 ...... 13 to 15 <-- LOW
103727 ...... 17.8 to 22.2
103841........13-20.5 (13 is hard driving, 20.5 is purely highway)
104226 ...... 15 to 17 (city)
105899 ...... 22 to 23
106429 ...... 17.3 to 21.3
106454 ...... 17.5 to 21
106647 .......14.9 to 25.6
107891 ...... 14 to 17 <-- LOW
108583 ...... 18.3 to 19.5

 

108837 min=14.28 max=22.58 lifetime avg=17.36

 

106908 - 15.3 - 20.1 (avg 17.7 mostly) only 1400 miles on it.

What I have found is this: the engine loves to rev, and driving under 2800 rpms seems to use MORE fuel. I have been driving at all speeds trying to keep the rpms between 2800 - 3100, this appears to give (my car) the best economy, that is until I get on it. I have noticed that ONE TICK (line) on the fuel guage = 10 miles to get 15 mpg, if I get 12 miles per tick I get 16-17 mpg. I had gotten almost 15 miles per tick and got 20 mpg.

Also I noticed keeping the rpms between 2800-3100 greatly reduces the carbon residue on the tailpipes. Has anyone else noticed this?

 

108417 18 - 20 mpg

70% Highway

 

 

New Summary

100804 ...... 20 to 21
100849 ...... 17.5 to 23.3
100879 ...... 18 to 20
101058 ...... 18 to 21
101083 ...... 15 to 19 (10% highway)
101212 ...... 21 to 22
101365 ...... 13 <-- LOW
101450 .......15.3 to 19.3 (mostly city to 60% highway, normally around 17-18, just once above 18.4)
102974........17 to 20
103130 ...... 13 to 15 <-- LOW
103727 ...... 17.8 to 22.2
103841........13-20.5 (13 is hard driving, 20.5 is purely highway)
104226 ...... 15 to 17 (city)
105899 ...... 22 to 23
106429 ...... 17.3 to 21.3
106454 ...... 17.5 to 21
106647 .......14.9 to 25.6
106908 ...... 15.3 to 20.1 (avg 17.7 mostly) only 1400 miles on it.
107891 ...... 14 to 17 <-- LOW
108417 ...... 18 to 20 mpg
108583 ...... 18.3 to 19.5
108837 ...... 14.28 - 22.58, lifetime avg=17.36
109161 ...... 19 to 21

Looks like my own .. the 109161 .. is the newest on the list? I bought it 9/16/.

 

@Spin9k:

>> Please tell me you are not serious?! If yiou drive keeping the RPMs in the 2800-3100 range, just forget it and trade it in on the new Toyota Prius. Smthg like ***80*** MPG and goobs of electric torque right at 0 RPM to boot! RideM cowboy! <<



Hey, no need to flame anyone. Granted, I wouldn't be able to stay at 3000 rpm either (doesn't that amount to only 60 mph in 6th gear?), but his finding *is interesting*, to me at least.

About your comment on the Prius; I've stated on a different thread before that it is possible to build cars that are futuristic in terms of fuel economy AND are fun.

Prototype - Opel Eco Speedster gets 114 miles per Gallon

There are people who drive a lot of miles. I do 100 miles a day just to get to work. If I had a 13 mpg tiny RX-8, I'd raise hell at the dealership. As someone else said, with 13 mpg, I want a 500 hp Viper.
I'm lucky, my Mazda gets me 19-21, just barely tolerable.

-Peter

 

112585 getting a consistent 21 mpg (combo of city & highway)

 

100804 ...... 20 to 21
100849 ...... 17.5 to 23.3
100879 ...... 18 to 20
101058 ...... 18 to 21
101083 ...... 15 to 19 (10% highway)
101212 ...... 21 to 22
101365 ...... 13 <-- LOW
101450 .......15.3 to 19.3 (mostly city to 60% highway, normally around 17-18, just once above 18.4)

102878 ...... I get 12-17 (85% city mostly, 6 mile work commute)

102974........17 to 20
103130 ...... 13 to 15 <-- LOW
103727 ...... 17.8 to 22.2
103841........13-20.5 (13 is hard driving, 20.5 is purely highway)
104226 ...... 15 to 17 (city)
105899 ...... 22 to 23
106429 ...... 17.3 to 21.3
106454 ...... 17.5 to 21
106647 .......14.9 to 25.6
106908 ...... 15.3 to 20.1 (avg 17.7 mostly) only 1400 miles on it.
107891 ...... 14 to 17 <-- LOW
108417 ...... 18 to 20 mpg
108583 ...... 18.3 to 19.5
108837 ...... 14.28 - 22.58, lifetime avg=17.36
112585 ...... getting a consistent 21 mpg (combo of city & highway)

 

Chill - I did this on a hunch. I drive to work at 05:00 on 45 mph roads, speeding (much over 60 ) is not an option. The police are all over the place. I tested the RPM range because the RX-8 is rated at 24 highway right? and that testing is done by the EPA - Right? and at 55 mph in 6th gear is roughly 2800 rpms (or close to it) Right? So I figured if I kept the RPMS in the HIGHWAY rpm range (but going at legal speeds) would I, Could I get 24 mpg, and the answer is NO.

FYI I do not drive like a granny, it was just a test. Helps keep me awake on the 30 mile drive.

 

No flame really, and I think the new Prius is pretty nice for relatively sedate ciy/suburban driving. It sounded like you were so focused on MPtick and all, not so much the rest of our nice car.

I also did a test of sorts this last week. Went upcountry NH on relatively quiet morning. Normal mileage here w/small trips 10-20 miles is 18mpg, this trip was 23.3mpg for 200+ miles, PDC to 24mpg advertized I'd say.

In fact my light normally comes on plus/minus 250m, this time at fill I was at 3/4 and it was 266miles !! Did some redlines, mostly 50-70 mph for long stretches, wasn't really paying attention to that.

Not bad, and it totally surprised me, I'd thought maybe 20. With no fun, it might even get 24+

 

I'f I drive speed limit on the turnpike here in FL (70MPH) for my cruise to work (about 39 miles) I get as high as 26MPG. My everyday city driving with traffic and AC (mandatory most of the time in FL), I get a low of 16 and a high of 19 (pure city, no highway).

Not as good as the 30+ on my Neon, but then again, this aint no Neon :D

 

101897 -- 16.7 mpg typically

 

Most of my driving is from stoplight to stoplight, with a brief 4 mile run on a highway (that's when I let er rip) I love to hear that ever so faint chime. Almost all of my driving is with the A/C on, and you know what? The RX-8 does not feel any more powerful with A/C off than with it on. Some cars feel much stronger with the A/C off, but not the '8', it pretty much feels the same.

Anyway, the engine appears to run better when it is revving rather than loafing.

 

new summary (I see no scheme, looks like there are not that many folks with really poor mpg numbers), so we find out that at least :-)

100804 ...... 20 to 21
100849 ...... 17.5 to 23.3
100879 ...... 18 to 20
101058 ...... 18 to 21
101083 ...... 15 to 19 (10% highway)
101212 ...... 21 to 22
101365 ...... 13 <-- LOW
101450 ...... 15.3 to 19.3 (mostly city to 60% highway, normally around 17-18, just once above 18.4)
101897 ...... 16.7 mpg typically
102878 ...... I get 12-17 (85% city mostly, 6 mile work commute)
102974....... 17 to 20
103130 ...... 13 to 15 <-- LOW
103727 ...... 17.8 to 22.2
103841....... 13-20.5 (13 is hard driving, 20.5 is purely highway)
104226 ...... 15 to 17 (city)
105899 ...... 22 to 23
106429 ...... 17.3 to 21.3
106454 ...... 17.5 to 21
106647 ...... 14.9 to 25.6
106908 ...... 15.3 to 20.1 (avg 17.7 mostly) only 1400 miles on it.
107891 ...... 14 to 17 <-- LOW
108417 ...... 18 to 20 mpg
108583 ...... 18.3 to 19.5
108837 ...... 14.28 - 22.58, lifetime avg=17.36
109161 ...... 19 to 21
112585 ...... 21 - getting a consistent 21 mpg (combo of city & highway)

 

109058 16.5-22

 

Yeah, at least the 8 doesn't break every 200 miles.

 

Got my 8 July 15, 03. My average MPG has been 15.9. VIN is 101604. MPG has been getting better with miles, I now have 2400. I really expect better mileage in line with the EPA estimates. Let's hope something shows up in our data sharing.

 

101145

13-15 CITY
19 HIWAY

 

110311 17 mpg 50/50 mix city/hwy driving on first 2 tanks.

 

100112

17.5-19.8

 

100717, delivered July 16.
At 2.700 miles, last highway trip had 3 tanks -- 25,20,20; last city tank was 16.

 

105730

I'm just under 2000 miles. Had to add about a quarter quart of oil because the oil light indicator came on and stayed on. The oil on the dip stick was only 1/3 of the way down.

Worst mileage 17 MPG city & hard driving
Best mileage 23.2 MPG highway only (75 MPH)

Average city/highway: 18-19 MPG

Average highway only: 22 MPG (that's at 75-80 MPH all the way)

 

100112 ...... 17.5 to 19.8
105730 ...... 17 to 22
100717 ...... 16 to 25
100804 ...... 20 to 21
100849 ...... 17.5 to 23.3
100879 ...... 18 to 20
101058 ...... 18 to 21
101083 ...... 15 to 19 (10% highway)
101145 ...... 13 to 19
101212 ...... 21 to 22
101365 ...... 13 <-- LOW
101450 ...... 15.3 to 19.3 (mostly city to 60% highway, normally around 17-18, just once above 18.4)
101604 ...... 15.9 average after 2400 miles
101897 ...... 16.7 mpg typically
102878 ...... I get 12-17 (85% city mostly, 6 mile work commute)
102974....... 17 to 20
103130 ...... 13 to 15 <-- LOW
103727 ...... 17.8 to 22.2
103841....... 13-20.5 (13 is hard driving, 20.5 is purely highway)
104226 ...... 15 to 17 (city)
105899 ...... 22 to 23
106429 ...... 17.3 to 21.3
106454 ...... 17.5 to 21
106647 ...... 14.9 to 25.6
106908 ...... 15.3 to 20.1 (avg 17.7 mostly) only 1400 miles on it.
107891 ...... 14 to 17 <-- LOW
108417 ...... 18 to 20 mpg
108583 ...... 18.3 to 19.5
108837 ...... 14.28 - 22.58, lifetime avg=17.36
109058 ...... 16.5 to 22
109161 ...... 19 to 21
110311 ...... 17 (on first 2 tanks, very new car)
112585 ...... 21 - getting a consistent 21 mpg (combo of city & highway)