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416 Miles / 670km with ONE tank !!!!!!

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Old 09-23-2012, 07:37 PM
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Thumbs up 416 Miles / 670km with ONE tank !!!!!!

So today i just reached 670km with one tank wich is about 416miles !!! how ? here is the trick... (works better on road trips)

Use draft created by big trucks... stay behind them all the way and enjoy the view thats the best way to get high mpg in an rx8... the closer u get the more mpg u get. too close can be dangerous. staying 100ft behind a truck can save up to 30% GAS...50ft 43% u do the math !

So yeah i guess that's the highest miles per tank done ? yet...

my personal best with normal driving is 450km (280miles)
Old 09-23-2012, 07:42 PM
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I guess you answered your "poor mileage" question from a few other threads then.


And yes, drafting is part of hypermilling, which can be used by any car out there, not just the RX-8. If you are interested in seeing all the other methods of hypermilling, here is a decent site. http://ecomodder.com/forum/EM-hyperm...ecodriving.php


If you ran the tank empty (15.9 US gallons) doing that, it's 26mpg to the US people, which is certainly in the realm of possibility when hypermilling. I'm guessing you were at least below the 13.1 gal low fuel light.

So, no, not a record. A few people have been up there. I've been up to 27mpg myself. It's insanely boring though. And too much driving like that will just build up excessive carbon in the RX-8's engine. Plus, note this section of the wiki:
Safety and awareness program

Hypermiling has come under fire from several quarters due to claims of dangerous or unlawful behavior by some hypermilers,[5] such as tailgating larger vehicles on freeways to save fuel. As a result, the Hypermiling Safety Foundation was formed in August 2008 to promote a safety and public awareness program, advocating legal fuel-saving techniques.

Last edited by RIWWP; 09-23-2012 at 07:51 PM.
Old 09-23-2012, 07:51 PM
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Originally Posted by RIWWP
I guess you answered your "poor mileage" question from a few other threads then.


And yes, drafting is part of hypermilling, which can be used by any car out there, not just the RX-8. If you are interested in seeing all the other methods of hypermilling, here is a decent site. Hypermilling 101


If you ran the tank empty (15.9 US gallons) doing that, it's 26mpg to the US people, which is certainly in the realm of possibility when hypermilling. I'm guessing you were at least below the 13.1 gal low fuel light.

So, no, not a record. A few people have been up there. I've been up to 27mpg myself. It's insanely boring though. And too much driving like that will just build up excessive carbon in the RX-8's engine. Plus, note this section of the wiki:
Oh man u always got the answers!!! ^^ **** i thought it was really good... honestly i can't understand how u can get more ... no i still didn't get the low fuel light
Old 09-23-2012, 07:52 PM
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Wasn't this on Mythbusters?
Old 09-23-2012, 07:55 PM
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Originally Posted by Junkman 6394226
Wasn't this on Mythbusters?
"This"? You mean Chris Ryan from Switzerland getting 416km on a tank of gas?


I doubt it.
Old 09-23-2012, 07:58 PM
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No, no. "This", the concept of drafting definitively increasing mileage. Of course, the closer you get the less reaction time you have available, so it can be inherently dangerous... Setting the cruise control is much safer
Old 09-23-2012, 07:59 PM
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Originally Posted by Chris Ryan
Oh man u always got the answers!!! ^^ **** i thought it was really good... honestly i can't understand how u can get more ... no i still didn't get the low fuel light
Can I ask your method of calculation?



I think the published record (which very few people believe, though I do), is olddragger's supercharged and re-geared RX-8. There is another guy on here experimenting the more exotic ECU re-tuning to see what impact on mileage he can get just from that, and has been able to show significant improvement for short periods of time before the ECU figures out that it's operating outside of it's intended parameters and over-rides his adjustments.
Old 09-23-2012, 08:03 PM
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Originally Posted by Junkman 6394226
No, no. "This", the concept of drafting definitively increasing mileage. Of course, the closer you get the less reaction time you have available, so it can be inherently dangerous... Setting the cruise control is much safer
Ah. Not sure if it was ....


Ah, here: Mythbusters: drafting 10 feet behind a big rig will improve mileage 39 percent

Yeah, it's no surprise to anyone with an ODB2 reader that looks at live data. Set cruise control on flat ground faintly faster than a truck ahead of you in the same lane and watch the calculated load, instant mileage, fuel injector duty cycle, or MAF data, and you will see that they change more and more the closer you get.

Lower wind resistance means less energy needed to overcome it.


And yes, there are limits to what is reasonable, and it can easily cross into stupidity and dangerous driving.
Old 09-23-2012, 08:05 PM
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Originally Posted by RIWWP
Can I ask your method of calculation?



I think the published record (which very few people believe, though I do), is olddragger's supercharged and re-geared RX-8. There is another guy on here experimenting the more exotic ECU re-tuning to see what impact on mileage he can get just from that, and has been able to show significant improvement for short periods of time before the ECU figures out that it's operating outside of it's intended parameters and over-rides his adjustments.
Well i got the 5 speed manual if it changes something... I'm below the last line of the fuel gauge but don't have the light yet... well calculation is done by me and stuff i just saw online. as i usually only get 350km per tank its about 40% increase.
Old 09-23-2012, 08:06 PM
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Originally Posted by Junkman 6394226
No, no. "This", the concept of drafting definitively increasing mileage. Of course, the closer you get the less reaction time you have available, so it can be inherently dangerous... Setting the cruise control is much safer
no cruise control here in EU
Old 09-23-2012, 08:20 PM
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I drafted behind trucks in my Jeep Cherokee at 65 mph and was able to increase my mileage from 15 to 19 mpg.
Old 09-24-2012, 04:23 AM
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Lovely signature chris.
Old 09-24-2012, 01:19 PM
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I try not to follow trucks, that is how I got the small crack in my window and chips in my paint. All it takes is for them to hit a little patch of rocks or go off the road slightly and you get sand blasted.
Old 09-24-2012, 02:23 PM
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Old 09-24-2012, 02:55 PM
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Good thing to do if you really hate your 8 ...
Old 09-24-2012, 03:22 PM
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Im a new to the rx8 club where to i start a thread or make a post at?
Old 09-24-2012, 03:33 PM
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Originally Posted by graffjosrx8
Im a new to the rx8 club where to i start a thread or make a post at?
You don't start a new thread. Just read the threads already here. And you already posted.
Old 09-24-2012, 04:15 PM
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Originally Posted by graffjosrx8
Im a new to the rx8 club where to i start a thread or make a post at?
You go to the most appropriate forum and look for this icon

Originally Posted by 9krpmrx8
You don't start a new thread. Just read the threads already here. And you already posted.
While you are right, I don't like the way it came out.
You should use the search function to find your answer. There is 10 yrs of information accumulated on this site and chances are it's been covered. Failure to do so, while it isn't sanctioned, will result in nasty comments.
Old 09-24-2012, 04:15 PM
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oh okay thanks.
i was just wanting to make ask some questions on the habits i should devolop for having my 08 rx8 as a daily driver if you guys could help me out
Old 09-24-2012, 04:42 PM
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Originally Posted by graffjosrx8
oh okay thanks.
i was just wanting to make ask some questions on the habits i should devolop for having my 08 rx8 as a daily driver if you guys could help me out
Warm it up drive it everyday redline it and don't forget the oil...
Old 09-24-2012, 05:02 PM
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thanks.
in the morning should i let it sit there and warm up till its at operating temp or just for a min and the drive til its warm?
Old 09-24-2012, 05:03 PM
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Originally Posted by Kustom
Lovely signature chris.
Looks like the OP really likes your signature Kustom.
Old 09-24-2012, 05:47 PM
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Originally Posted by graffjosrx8
thanks.
in the morning should i let it sit there and warm up till its at operating temp or just for a min and the drive til its warm?
Personally i wait till the ''auto rpms'' are going back to idle and drive it slow for a good 15 min.
Old 09-26-2012, 06:26 AM
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Sweet!

So with all the money you save will you be repainting the front end and hood from all the rocks that get kicked up by those big truck tires?

Breaking even FTW!!
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