How to get BEST MPG on Rx8 (~20-22mpg)
#52
Registered User
Join Date: Nov 2007
Location: Love Field.
Posts: 169
Likes: 0
Received 0 Likes
on
0 Posts
Sorry Bro. Still within 12 months and 12,000 miles. If I think a wiper blade is a little flaky, I get it replaced. (For another month and 1/2).
And why is topping off bad for the evap system. Somebody school me on that.
And why is topping off bad for the evap system. Somebody school me on that.
#53
Registered
I'm no expert, but what I've heard about overfilling the gas tank is that if gas (and not just fumes) backs up into the charcoal canister enough times, it can degrade the charcoal, cause it to break up into small bits, which can then lodge in a valve in the evaporative system, causing it to stick open. Not sure of that, just repeating what I've heard from people who at least seem to know more than me.
#54
I would hope most people simply divide the gallons when they fill up by the miles since they last filled up. If you're dividing by the theoretical capacity of the tank, you're going to be way off. Isn't that how most people do it?
#55
Registered
Of course. No one said anything about using the theoretical capacity of the tank. But I'm sure you also realize that simply dividing the gallons when you fill up will also always introduce some error since the tank will not be filled up to exactly the same point each time, hence what I said about a margin of error.
#56
Registered User
Join Date: Nov 2007
Location: Love Field.
Posts: 169
Likes: 0
Received 0 Likes
on
0 Posts
You can easily put more than a gallon of gas into the tank after the first "click" of the gas pump. Your MPGs would then vary wildly. My measurements are done by filling until the gas is visible in the filler, but given that charcoal canister issue, I'm gonna stop doing that.
#61
The 337
Join Date: Jul 2008
Location: Lafayette, LA
Posts: 1,282
Likes: 0
Received 0 Likes
on
0 Posts
#62
#63
Software Engineer
Join Date: Sep 2008
Location: Fort Lauderdale, Florida
Posts: 1,376
Likes: 0
Received 1 Like
on
1 Post
I didn't buy my 8 to worry about gas mileage.. longest I've done on 1 tank though was 324 miles with one last little bar before the E.. 100% highway driving in 6th gear at 4k RPMs I believe.
#64
WENTGERMAN
iTrader: (6)
there is a simple answer.. fill up and record the mileage you have.. then at half a tank add another $10 without recording it.. When you tally it all up on paper you'll hit like 30mpg or more.. baller...
anyway in the real world keep it under 4000 use premium good not bp **** or arco.
buy all lightweight parts (flywheel exhaust pulleys) and use the cruise control often..
Good luck gentlemen!
anyway in the real world keep it under 4000 use premium good not bp **** or arco.
buy all lightweight parts (flywheel exhaust pulleys) and use the cruise control often..
Good luck gentlemen!
#65
Mpg???
Did you guys really buy these 8s for the mileage?? Come on, these cars are meant to drive hard! These are thoroughbreds, and as such will eat like their horse counterparts... a lot!!
Mine is still in storage until the much awaited spring and so I take the time to make her shine inside and out... I'll line up a new set of skins for the back as well ... haven't any idea what happened to the originals, heh heh!
MPG, is a slight concern, but only if it drops to lows, then its telling me somethings wrong... until then boyz 'n girlz I'm doing what these are meant to do:
ZOOM ZOOM!!!!
Mine is still in storage until the much awaited spring and so I take the time to make her shine inside and out... I'll line up a new set of skins for the back as well ... haven't any idea what happened to the originals, heh heh!
MPG, is a slight concern, but only if it drops to lows, then its telling me somethings wrong... until then boyz 'n girlz I'm doing what these are meant to do:
ZOOM ZOOM!!!!
#68
But during wintertime, my mileage drops from 360-380 km to 250-300 km. Tire size is by the book. Has been like that for 6 years...
Kaido
#72
Mpg sucks...
My '04 has been getting an average of 15 mpg lately. What kind of air filter and air intake should I buy to raise the mpg at least a little? Please post websites where I can buy one. Also, will they EVER come out with a performance chip!? that would be the highlight of my life! Much appreciated!
#73
Un-Registered User
My '04 has been getting an average of 15 mpg lately. What kind of air filter and air intake should I buy to raise the mpg at least a little? Please post websites where I can buy one. Also, will they EVER come out with a performance chip!? that would be the highlight of my life! Much appreciated!
#74
My '04 has been getting an average of 15 mpg lately. What kind of air filter and air intake should I buy to raise the mpg at least a little? Please post websites where I can buy one. Also, will they EVER come out with a performance chip!? that would be the highlight of my life! Much appreciated!
You have some reading to do or you will be flamed (ridiculed) to death on this site. There is no "performance chip" that will actually do anything good for your RX-8.
Please read the following: https://www.rx8club.com/rx-8-discuss...thread-242295/
If you have questions and don't want someone to give you a hard time go here: https://www.rx8club.com/rx-8-discuss...llowed-208221/
#75
Registered
iTrader: (2)
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,684
Likes: 0
Received 253 Likes
on
110 Posts
These two threads are a bit more accurate for his reading:
https://www.rx8club.com/rx-8-discuss...t-here-202454/
https://www.rx8club.com/rx-8-discuss...rx-8-a-233937/
Specifically on the 2nd link:
- Intakes and filters are addressed in post 2
- ECU chips are addressed in posts 2 and 3
- Gas mileage mods are addressed in post 10
The short answer is that 15mpg with 100% highway means something on your car has FAILED. You need to repair the problem.
15mpg with 100% city is about normal, maybe a tad low.
https://www.rx8club.com/rx-8-discuss...t-here-202454/
https://www.rx8club.com/rx-8-discuss...rx-8-a-233937/
Specifically on the 2nd link:
- Intakes and filters are addressed in post 2
- ECU chips are addressed in posts 2 and 3
- Gas mileage mods are addressed in post 10
The short answer is that 15mpg with 100% highway means something on your car has FAILED. You need to repair the problem.
15mpg with 100% city is about normal, maybe a tad low.