I believe that those who get only 13 mpg - no matter how carefully they drive - must have a defect in their RX-8.

My theory is that they were all built in one time frame, probably early on.

You can decode your VIN here:
http://www.analogx.com/contents/vinview.htm


So here comes my info - the last 6 digits of the VIN are the serial number.

VIN: JM1FE173940109161
Optimum: 21 mpg on highway after 2000 miles

(Plant 0, Serial Number 109161)

Let's see what those folks with 13 mpg have.

If you're concerned about privacy etc... keep in mind that everyone can read your VIN when you park your car at the grocery store.

 

my last digits were 1365, and I got around 13 MPG

 

I think it'd be best to give 6 digits..

 

do you want just those w/ 13 mpg? or everyone...

ah well i get ~18mpg ocassionally 20 when i do lots of highway
vin is 100879

 

i think as many as possible, both good and bad mpg.

Once in a while we collect and sort them, like this:

100879 ...... 18 to 20
109161 ...... 19 to 21
xx1365 ...... 13


sorted by increasing VIN..

 

107891 ...... 14 to 17

 

103130 ---- 13 to 15

 

Between 17-18 mainly city, 20+ going uphill, 24+ coming back from Flagstaff, 7K feet to 1.2K feet. Driving style does not seem to make much difference, so have fun.

 

so what are the last 6 digits of your VIN?

 

VIN was on the re line, 101058, which was relatively early first allocation. Picked it up July 18.

 

I hope that everyone does the math on mpg right, has been debated enough. Here's a new summary. So far 2 ppl with real low numbers, and their VINs are indeed "together" in the sorted list:

Last 6 digits of VIN ..... mpg

100879 ...... 18 to 20
103130 ...... 13 to 15 <-- low
107891 ...... 14 to 17 <-- low
109161 ...... 19 to 21
101058 ...... 18 to 21
xx1365 ...... 13

Have you added yours?

-Peter

 

105899

22-23 mpg
80% highway commute

 

106454 here, between 17.5 and 21 depending on the HW i drive.

 

103727
city 17.8 highway 22.2
MPG continues to improve w/mileage.

 

Last 6 digits of VIN ..... mpg

100879 ...... 18 to 20
103130 ...... 13 to 15 <-- low
103727 ...... 17.8 to 22.2
105899 ...... 22 to 23
106454 ...... 17.5 to 21
107891 ...... 14 to 17 <-- low
109161 ...... 19 to 21
101058 ...... 18 to 21
xx1365 ...... 13

 

108583

Lowest - 18.3

Highest - 19.5

All tanks have been 50/50 driving.

 

104226 15 to 17 MPG (mostly city)

 

Tell me that you are kidding about the grocery store comment! You don't have a sign on the car saying that my name is [rx8club.com name], search for all my posts, do you?

I don't see any patterns emerging yet.

I will say that right after an ecu reset, the car seems to have better fuel economy. But you have been looking at my a/f graphs in the tech garage, right?

 

100804

20-21 mpg

about 75% highway

 

New summary:

100804 ...... 20 to 21
100879 ...... 18 to 20
103130 ...... 13 to 15 <-- LOW
103727 ...... 17.8 to 22.2
104226 ...... 15 to 17 (city)
105899 ...... 22 to 23
106454 ...... 17.5 to 21
107891 ...... 14 to 17 <-- LOW
108583 ...... 18.3 to 19.5
109161 ...... 19 to 21
101058 ...... 18 to 21
xx1365 ...... 13

@syntrix: thanks for pointing me to the AF thread. Had not seen it before.

 

100804 ...... 20 to 21
100879 ...... 18 to 20
101058 ...... 18 to 21
xx1365 ...... 13
103130 ...... 13 to 15 <-- LOW
103727 ...... 17.8 to 22.2
104226 ...... 15 to 17 (city)
105899 ...... 22 to 23
106429 ...... 17.3 to 21.3
106454 ...... 17.5 to 21
107891 ...... 14 to 17 <-- LOW
108583 ...... 18.3 to 19.5
109161 ...... 19 to 21

I think you had the 1058 & 1365 in the wrong place, so I fixed that & added mine (6429)

 

100804 ...... 20 to 21
100879 ...... 18 to 20
101058 ...... 18 to 21
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
104226 ...... 15 to 17 (city)
105899 ...... 22 to 23
106429 ...... 17.3 to 21.3
106454 ...... 17.5 to 21
107891 ...... 14 to 17 <-- LOW
108583 ...... 18.3 to 19.5
109161 ...... 19 to 21

 

100804 ...... 20 to 21
100879 ...... 18 to 20
101058 ...... 18 to 21
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
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
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
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)
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
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