Cumulative Gas Mileage (Gas MPG) Thread
10-30-2005, 07:45 PM
#511
脾臓が痛みました
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Originally Posted by lkpsea
Thanks for your post - it sounds like you do the same drive to work (or did) as I do; 10 miles each way with way too many lights on the way (probably about 10 or so for me). If I drive like Grandma, I get 13-15 mpg. Last tank, I just said "to heck with it" and drove like I want to. I got 12 MPG!!!!!! I agree - I wouldn't be bitching except that I was stupid enough to actually believe that 18/24 EPA rating on the new car sticker when I bought the 8. True- they're usually misleading, but not by this much, in my experience. I do like my 8, but know I won't own it long because of this. Too bad it's so wet in Seattle. I'd take my motorcycle to work everyday if it wasn't so dark, cold and wet - too DANGEROUS for this biker chick!
Lily
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11-01-2005, 07:52 AM
#512
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I seem to be getting worse mileage with the "R" flash. Anyone else seeing this?
I just tried a new oil additive that works wonders in piston engines, but if it's doing anything in the rotary, with mileage, it may be the problem, not a solution. I must say, the stuff does make it run like a well oiled clock, so maybe the added fun is adding to the reduced mileage. Even though I feel as if I'm driving the same, I know that speedometer is saying something different.
I almost get the feeling that the later flashes that have added to the low-end torque may be doing this by more agressive throttle application in the drive by wire system. I don't know how the system works, so this may or may not be possible with a new flash. I just know the thing really jumps out from a stop with very little driver throttle input.
I really don't know why I'm so obsessed with mileage, I can afford the gas and this thing is such a pleasure to drive.
By the way - via edit - I was averaging right at 20 mpg in mostly two lane road, semi-country (building up way too damned fast) commuting, now I have dropped to a hair under 19 mpg.
I just tried a new oil additive that works wonders in piston engines, but if it's doing anything in the rotary, with mileage, it may be the problem, not a solution. I must say, the stuff does make it run like a well oiled clock, so maybe the added fun is adding to the reduced mileage. Even though I feel as if I'm driving the same, I know that speedometer is saying something different.
I almost get the feeling that the later flashes that have added to the low-end torque may be doing this by more agressive throttle application in the drive by wire system. I don't know how the system works, so this may or may not be possible with a new flash. I just know the thing really jumps out from a stop with very little driver throttle input.
I really don't know why I'm so obsessed with mileage, I can afford the gas and this thing is such a pleasure to drive.
By the way - via edit - I was averaging right at 20 mpg in mostly two lane road, semi-country (building up way too damned fast) commuting, now I have dropped to a hair under 19 mpg.
Last edited by Kwullen; 11-01-2005 at 07:56 AM.
11-03-2005, 09:26 PM
#513
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I just filled up for the first time in my new 2005 MT 8 today. I'm hoping the 13.8 MPG improves with time! I've been driving 80/20 city/highway miles and TRYING to be good about keeping the engine under 4k rpm during the break-in period. I'll try keeping it under 3750 rpm and see if that improves things.
11-18-2005, 11:58 PM
#514
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Hi, first post here. I've got about 1000 miles on my new 2005 MT, and I'm getting over 18MPG. I started checking on the second tank, and even after a day of fun driving through the mountains, I still got a little over 18. Overall, with weekday commuting and weekend fun, I get around 22-ish. Try driving at a higher RPM... 3000 RPM is almost lugging the engine. I almost never drive under 4500 RPM... shift at 6 - 8000 RPM... 
12-23-2005, 09:54 AM
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This is my report on my 2005 6sp.
NYC
30-40 deg.
93 oct.
Normal Driving. 3-4k Shifting
80% highway 20% local.
Milage------Gallons MPG
427---------3.9
481--------13.3------13.8
665--------12.5------13.8
858--------12.9------15.4
1067-------13.2------16.2
1223-------11.4------11.8
1425-------13--------17.7
1642-------14--------16.6
1843-------12.4------14.27
2066-------13.27-----17.98
I am going to use the tripometer and start documenting it too.
Overall, I seem to be gaining a bit. I also have a feeling that driving at higher speed saves gas?
(around 70-80 mph) instead of my usual 40-60 due to traffic every day.
NYC
30-40 deg.
93 oct.
Normal Driving. 3-4k Shifting
80% highway 20% local.
Milage------Gallons MPG
427---------3.9
481--------13.3------13.8
665--------12.5------13.8
858--------12.9------15.4
1067-------13.2------16.2
1223-------11.4------11.8
1425-------13--------17.7
1642-------14--------16.6
1843-------12.4------14.27
2066-------13.27-----17.98
I am going to use the tripometer and start documenting it too.
Overall, I seem to be gaining a bit. I also have a feeling that driving at higher speed saves gas?
(around 70-80 mph) instead of my usual 40-60 due to traffic every day.
Last edited by nedor; 01-17-2006 at 09:59 AM.
12-23-2005, 01:53 PM
#516
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I don't understand your table. For example, at 427 miles you filed up the tank and it took 3.8 gals. Then 54 miles later you filled the tank with 13.3 gals. That certainly is very poor mileage , so I suspect you transposed some numbers. You should expect to get about 19-20 mpg with that type of driving based on what other owners have reported here on the forum.
, so I suspect you transposed some numbers. You should expect to get about 19-20 mpg with that type of driving based on what other owners have reported here on the forum.
12-23-2005, 03:10 PM
#517
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Originally Posted by Go48
I don't understand your table. For example, at 427 miles you filed up the tank and it took 3.8 gals. Then 54 miles later you filled the tank with 13.3 gals. That certainly is very poor mileage , so I suspect you transposed some numbers. You should expect to get about 19-20 mpg with that type of driving based on what other owners have reported here on the forum.
, so I suspect you transposed some numbers. You should expect to get about 19-20 mpg with that type of driving based on what other owners have reported here on the forum.I hope the formula is correct.
Nedor
12-27-2005, 11:36 PM
#518
Rotary til I die
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Ours AT 05 8 is getting better mileage as we get more miles on it. First tank we measured was 18.32 and now with a little or 2500 miles on it, we got 22.8 and that's with an extended drive up a mountain in 3rd gear mainly. I'll get off my "my mileage sucks" kick now
Tim
Tim
12-31-2005, 11:22 AM
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13,000 now on my 6MT. Done quite a few road trips on I-70. So I generally run at about 80mph on the highway. It's getting a consistent 21-22 on the plains (this is complete tanks of fill up, merge, and run till the next gas station.) In the mountains I can get around 24-25. As far as city, I was getting about 20-21 in mixed driving, but since the R-flash it seems to be more like 17. I need to keep an eye on that.
12-31-2005, 02:32 PM
#520
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Help!
OK, I've had my 8 for about two months now. On the last 10 tanks of gas I am averaging 11 MPG in mixed driving. On a few tanks I drove like Grannie May taking her Sunday drive to the grocery store and still only got 11.5 MPG. And, I live in Vegas, so it has been nice weather - usually 50 or 60 degrees ambient temps.
Here are the details of my 8:
MT
22K Miles
no mods
BF Goodrich KDW Tires - 35 PSI
91 Octane Chevron
I think I have the latest flash as I have a service receipt from 10/05 that shows an ECU download was installed.
I know this is a sports car, but 11 MPG is just unreasonable. That's $100 a month extra for gas than I budgeted.
Any ideas? I love the 8, but a 36 foot motor home would get better gas mileage.
Could my cat be damaged? Problematic plugs? Extreme carbon deposits in the engine?
I would like some ideas before I go to the dealer and get snubbed... TIA.
Here are the details of my 8:
MT
22K Miles
no mods
BF Goodrich KDW Tires - 35 PSI
91 Octane Chevron
I think I have the latest flash as I have a service receipt from 10/05 that shows an ECU download was installed.
I know this is a sports car, but 11 MPG is just unreasonable. That's $100 a month extra for gas than I budgeted.
Any ideas? I love the 8, but a 36 foot motor home would get better gas mileage.
Could my cat be damaged? Problematic plugs? Extreme carbon deposits in the engine?
I would like some ideas before I go to the dealer and get snubbed... TIA.
01-02-2006, 08:02 AM
#521
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I have a sudgestion, im very aware the the rotar is a very unique motor, but what im about to say applys to any fuel consuming applacation. weather you have a large V8that revs low or an Rx8 that revs high, not reving the motor the way it needs to be reved or likes to be reved, Can and does cause carbin build up in the fireing chamber. As i saw on page 1, you dont rev you engin, probley think your saving it, infact every so often, you need to Run it out, make it work. This may help your cace.
02-01-2006, 01:32 PM
#524
...Hello again Officer...
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Greetings!
This is my first post on the boards, but I have been searching/reading/lurking for a pretty long time now. I've been learning all I can about 8's because I am looking forward to replacing my 5th gen Prelude and S/C'd '01 S2000 with one car that covers 95% of what I like about both cars and none of the attributes that I don't. I'm not a complete newb to the "wankel lifestyle"
... but there's always more to know.
That being said. Niether of my Hondas post particularly better mileage numbers than the 8 does, even before I modified anything. I average around 18 mpg in each in mixed use. I have never gotten better than 230 miles to a tank in the Lude and that's my commuter car! There have been plenty of times where I have managed far less than that, but had fun doing it. I guess I don't understand what some of the pump shock is all about.
The same thing goes with checking your oil while topping off your tank ever other gassing. VTEC engines love burning up oil in the higher rpm range. The lude will go through a quart every 3000 miles or so... To me alot of the "quirks" that some feel are annoying in the 8 are just...well...normal
Now to my question. I'm assuming that if I buy new that I don't have to worry about what flash I'm on...it should be M or N as I understand it...however...if I buy a used one, should I have the flash checked by the dealer before I buy it? The deals currrently for new ones are pretty good. I just want to know if it's worht the time to save a moderate amount of money.
Love the site and I can't thank you guys enough for everything I know now before I buy.
Ride on! (and sorry for the book),
Led
This is my first post on the boards, but I have been searching/reading/lurking for a pretty long time now. I've been learning all I can about 8's because I am looking forward to replacing my 5th gen Prelude and S/C'd '01 S2000 with one car that covers 95% of what I like about both cars and none of the attributes that I don't. I'm not a complete newb to the "wankel lifestyle"
... but there's always more to know.That being said. Niether of my Hondas post particularly better mileage numbers than the 8 does, even before I modified anything. I average around 18 mpg in each in mixed use. I have never gotten better than 230 miles to a tank in the Lude and that's my commuter car! There have been plenty of times where I have managed far less than that, but had fun doing it. I guess I don't understand what some of the pump shock is all about.
The same thing goes with checking your oil while topping off your tank ever other gassing. VTEC engines love burning up oil in the higher rpm range. The lude will go through a quart every 3000 miles or so... To me alot of the "quirks" that some feel are annoying in the 8 are just...well...normal
Now to my question. I'm assuming that if I buy new that I don't have to worry about what flash I'm on...it should be M or N as I understand it...however...if I buy a used one, should I have the flash checked by the dealer before I buy it? The deals currrently for new ones are pretty good. I just want to know if it's worht the time to save a moderate amount of money.
Love the site and I can't thank you guys enough for everything I know now before I buy.
Ride on! (and sorry for the book),
Led
02-01-2006, 02:07 PM
#525
Registered
Great first post! I tend to agree with your comments about obsessing about the "shortcomings" of the RX-8. Mine will be 2 years old soon and I haven't experienced any of that and have averaged 20+ mpg for 10K miles, mixed driving with regular runs to the redline.
An '05 or '06 RX-8 will almost certainly will be up to date. In any case, don't worry about the ECU level since you could take the car to any dealer and have it checked/updated free of charge. The software level depends on which model and which country and/or region of the country the car is operated in. You can see what I mean by going to the Service Bulletins and reading the one concerning a No-start condition. There is a table in that SB that lists the software levels by year-model-region. As an example, for an '04 MT in the US (except for Cali) I think the level has an "R" at the end of the version number and it's, therefore, referred to as the, duh, "R" flash.
An '05 or '06 RX-8 will almost certainly will be up to date. In any case, don't worry about the ECU level since you could take the car to any dealer and have it checked/updated free of charge. The software level depends on which model and which country and/or region of the country the car is operated in. You can see what I mean by going to the Service Bulletins and reading the one concerning a No-start condition. There is a table in that SB that lists the software levels by year-model-region. As an example, for an '04 MT in the US (except for Cali) I think the level has an "R" at the end of the version number and it's, therefore, referred to as the, duh, "R" flash.