Notices
RX-8 Discussion General discussion about the RX-8 that doesn't fit in one of the specialty forums.
Sponsored by:
Sponsored by: CARiD

how can i get better MPG???

Thread Tools
 
Rate Thread
 
Old May 22, 2008 | 01:27 PM
  #52  
neXib's Avatar
Registered
 
Joined: May 2008
Posts: 635
Likes: 1
From: Norway
Just wait till your gas prices reach our levels. People will murder for gas, good thing you don't have a lot of guns... no wait, nevermind :D
Reply
Old May 22, 2008 | 02:05 PM
  #53  
Roaddemon's Avatar
Registered
 
Joined: Jan 2004
Posts: 997
Likes: 0
From: Milwaukee Wi.
Originally Posted by neXib
Just wait till your gas prices reach our levels. People will murder for gas, good thing you don't have a lot of guns... no wait, nevermind :D

Hey Nexib, where are you from and what are your gas prices levels?
Reply
Old May 22, 2008 | 02:17 PM
  #54  
Mister Man's Avatar
Six Kinds of Wonderful
 
Joined: May 2008
Posts: 43
Likes: 0
From: Kitsap County, WA
The location says Norway and when we get as much stuff for "free" as the Norwegians do then they can complain about gas
Reply
Old May 22, 2008 | 02:29 PM
  #55  
Riken's Avatar
Drive it!
 
Joined: Feb 2008
Posts: 267
Likes: 0
From: Rocky Mount NC
I just got 301 miles out of 14.1 gallons I win!!!! lol
Reply
Old May 22, 2008 | 03:41 PM
  #56  
Johneecatt's Avatar
Registered User
 
Joined: Mar 2007
Posts: 8
Likes: 0
From: So-Cal
Originally Posted by mike73737
I have to disagree that it "hardly has any breaking power at all". I often downshift my fiance's Mazda3 auto and notice a significant increase in braking. I do it in the 8 all the time too, just let your foot off the pedal when you're cruising at 4k RPM and you'll feel the added drag. Put the clutch in and it'll free up.

I don't know if it actually is likely to damage the engine though... More than that I would think it will wear your clutch more because you're downshifting more often (thus your total number of shifts increases)
Compared to the power of brakes, engine compression has very little braking power. Sure, if you let your foot off the gas, it'll slow down.....and if your slowing for a stop light a block away.......well, I guess that's ok. But I sure don't want to dive deep into a corner with only engine compression. As for downshifting - the purpose of downshifting is not to slow the car, it's to be in the right gear when you accelerate. That's why you heel and toe; shift while braking, then get off the brakes and come out hard.
Reply
Old May 22, 2008 | 03:46 PM
  #57  
mike73737's Avatar
Registered User
 
Joined: Mar 2007
Posts: 283
Likes: 1
Originally Posted by Johneecatt
Compared to the power of brakes, engine compression has very little braking power. Sure, if you let your foot off the gas, it'll slow down.....and if your slowing for a stop light a block away.......well, I guess that's ok. But I sure don't want to dive deep into a corner with only engine compression. As for downshifting - the purpose of downshifting is not to slow the car, it's to be in the right gear when you accelerate. That's why you heel and toe; shift while braking, then get off the brakes and come out hard.
Well if you're driving like you're autoXing all the time I guess it wouldn't work for you. All I'm saying is it works fine for me and I end up using my brakes less. I'm not saying I never use my brakes, clearly I do, but it does slow you down significantly.
Reply
Old May 22, 2008 | 04:42 PM
  #58  
neXib's Avatar
Registered
 
Joined: May 2008
Posts: 635
Likes: 1
From: Norway
Originally Posted by Roaddemon
Hey Nexib, where are you from and what are your gas prices levels?
Norway, the gasprice here is about 9.3 per gallon (or 2.6 dollar per litre as we would say) and rising. As you may or may not know (take a look at this list if not: http://en.wikipedia.org/wiki/Chart_o..._oil_by_nation ) we are an oil country, you'd think we got it cheap Most of the prices is tax that goes to the government though.

MisterMan: I'd be interested to know what we get for free though. Free hospital and some other things, sure. So do Cubans We have pretty crappy roads by any standards, and it's expensive to own a car eventhough the country is long and there's a good distance between the big cities. There's 25% salestax on everything and I have to pay about 40,000 dollars in fees and taxes to the government for the RX-8 I'm importing that comes in addition to the amount it cost in the states. Yeah, it's really cheap here :P

Can't complain though really, but not to be rude, but you are getting away a bit easy on the gas prices so far, don't think it will last.

I'd never be able to even buy the RX-8 unless I had money saved up, inherited some, and haven't got anything else than a flat to pay off. I'm carmad, so I'll get by, but we don't get a lot of "free" stuff.
Reply
Old May 22, 2008 | 05:52 PM
  #59  
rled's Avatar
5Picker
 
Joined: Nov 2004
Posts: 158
Likes: 0
From: Tennessee
Originally Posted by daisuke
Bullcrap.

Braking with your brakes wears down your pads, your rotors and makes brake dust.

Using your engine to decelerate cuts off the fuel flow completely and just turns it into a glorified air compressor since it doesn't need fuel to keep it turning, the wheels are doing it for you.

Putting it in neutral and using your brakes means the engine is idling and using fuel to make it keep turning at idle.

I would imagine that an engine running on fuel is getting more wear than one that is just turning and not experiencing the burn. Not to mention you're saving on gas.
Deceleration braking does not turn of the fuel flow completely. It is the same as idling as far a fuel goes.If you want to squeeze more mpg out of it ,avoid jackrabbit starts and drive a steady speed when possible. I see people take off like a rocket when the next stoplight is 100 yards away. Then slam on the brakes to get stopped. You don't have to put your pedal to the floor every time you take off. I usually accelerate through the gears with about 1/4 throttle and shift at about 4500 rpm. Hold your throttle steady all the way , except when you shift .then back to about 1/4 throttle. I average 280 miles between tanks and a little over 12 gallons at fill up. I will run it up to 8k or so a couple times a week when I feel the need for speed.
Reply
Old May 22, 2008 | 06:31 PM
  #60  
Mister Man's Avatar
Six Kinds of Wonderful
 
Joined: May 2008
Posts: 43
Likes: 0
From: Kitsap County, WA
Originally Posted by neXib
Norway,

: snip :

MisterMan: I'd be interested to know what we get for free though. Free hospital and some other things, sure. So do Cubans We have pretty crappy roads by any standards, and it's expensive to own a car eventhough the country is long and there's a good distance between the big cities. There's 25% salestax on everything and I have to pay about 40,000 dollars in fees and taxes to the government for the RX-8 I'm importing that comes in addition to the amount it cost in the states. Yeah, it's really cheap here :P

Can't complain though really, but not to be rude, but you are getting away a bit easy on the gas prices so far, don't think it will last.

I'd never be able to even buy the RX-8 unless I had money saved up, inherited some, and haven't got anything else than a flat to pay off. I'm carmad, so I'll get by, but we don't get a lot of "free" stuff.
Well in all honesty, and you probably figured this out: I was just being a smart ***


You're right on gas, though. The reality is that we could be paying 6 or 7 dollars a gallon and still be miles ahead. The only thing you have on us is distance. It's not uncommon for a day try to take hundreds of miles (and still not be anywhere "fun"). Not to mention the public transportation system here is a joke. I could make my way to to europe and backpack around and have a great time. Around these parts: Good luck getting off the street corner.

The "free stuff" dig was (needless to say) that at least your tax dollars are more directly spent on things you actually see/use in some capacity. I'm tired of most of my tax dollars going to pay for crapola I'm not interested in.

But look. I've gone and rambled and derailed the heck out of this thread.

My bad.

But, "Hey!" It was nice conversing with you. Once again, I didn't mean to come across as a real ***.

(Oh and with current incentives (and an obscure discount through work) my RX-8 - which stickered at 33k - was only 26k)
Reply
Old May 22, 2008 | 06:50 PM
  #61  
mysql's Avatar
Doppelgänger
 
Joined: Feb 2008
Posts: 3,192
Likes: 1
From: Florida
Originally Posted by rled
Deceleration braking does not turn of the fuel flow completely. It is the same as idling as far a fuel goes.
neXib was correct. Engine braking completely cuts fuel. There is no combustion taking place. The engine is being turned over by the transmission. The fuel injection stops completely as there is no need for it.

Thus you burn more fuel at idle than while engine braking.
Reply
Old May 22, 2008 | 08:51 PM
  #62  
CarAndDriver's Avatar
2005 Black RX-8 GT 6M
 
Joined: Jul 2006
Posts: 6,350
Likes: 0
From: San Jose Area
Upshift asap.
Reply
Old May 23, 2008 | 01:38 AM
  #63  
rx8khan's Avatar
eazyryder
 
Joined: May 2008
Posts: 68
Likes: 0
From: totonto canada
what is a flash and when should i get it i have a 04 rx8 with 120 km
Reply
Old May 23, 2008 | 04:26 AM
  #64  
neXib's Avatar
Registered
 
Joined: May 2008
Posts: 635
Likes: 1
From: Norway
I won't take credit for being right on that Unnecessary downshifting is a wear on the clutch though, so personally I'd rather wear my brakepads than wear my clutch

MisterMan: I gotcha
Reply
Old May 30, 2008 | 12:01 AM
  #65  
rotarydrifter's Avatar
Thread Starter
Registered
iTrader: (2)
 
Joined: May 2008
Posts: 124
Likes: 0
okay i got 231 miles to the gallon, hitting redline once a day shifting at 3.5k rpms...
Reply
Old May 30, 2008 | 12:40 AM
  #66  
swoope's Avatar
Zoom-Freakin'-Zoom
iTrader: (5)
 
Joined: Jan 2004
Posts: 14,603
Likes: 36
From: orlando, fl
Originally Posted by rotarydrifter
okay i got 231 miles to the gallon, hitting redline once a day shifting at 3.5k rpms...
you did not. and i am sure of that.

beers
Reply
Old May 30, 2008 | 12:44 AM
  #67  
shaunv74's Avatar
Power!!
 
Joined: Feb 2004
Posts: 4,412
Likes: 3
From: Sunny See attle
Originally Posted by rx8khan
what is a flash and when should i get it i have a 04 rx8 with 120 km
Dealer reprograms your computer and if you've never gotten one as soon as possible!!
Reply
Old May 30, 2008 | 09:50 AM
  #68  
quantum's Avatar
Problem Child
 
Joined: Feb 2008
Posts: 101
Likes: 0
From: LI, New York
I use only the odd numbered gears, and get amazing MPG!
Reply
Old May 30, 2008 | 10:45 AM
  #69  
kevinD1226's Avatar
Registered User
 
Joined: May 2007
Posts: 414
Likes: 0
From: Lowell, Mass
i once only got 86 miles to a full tank lol, i drive it normal with the occasional redline. i also had a cel for a 02 sensor at the time too and my driving to work is 2-3 minutes i shut it off pull out my boxtruck out of the shop, start the rx8 back up and pull her into the nice heated garage thats y my gas milegae sucks.. but i get usually 160-190 miles to the tank
Reply
Old May 30, 2008 | 11:04 AM
  #70  
fahrfegneugen's Avatar
Registered
 
Joined: Jan 2008
Posts: 1,467
Likes: 1
From: Wash/Idaho
Wow, I am getting 216/218 miles to a tank consistently. I motor brake too
Reply
Old May 30, 2008 | 11:22 AM
  #71  
RotaryP7's Avatar
Seriously.. FML..
 
Joined: Oct 2006
Posts: 1,760
Likes: 0
From: Miami, FL
^ motor brake?
Reply
Old May 30, 2008 | 11:28 AM
  #72  
sharkman's Avatar
Registered
 
Joined: Jan 2005
Posts: 394
Likes: 0
From: San Diego, CA
ride a horse...ride a bike....walk to work...catch the bus....hitch a ride....get a trunk midget.....there are many ways to get good gas milage
Reply
Old May 30, 2008 | 11:29 AM
  #73  
fahrfegneugen's Avatar
Registered
 
Joined: Jan 2008
Posts: 1,467
Likes: 1
From: Wash/Idaho
When you slow the car down by down shifting. I don't really know what you call it... that's what how my buddies and I talk about in German...

For good mileage I bike to work and carpool. Get a road bike, it is fun, quick, and cheaper than the car.
Reply
Old May 30, 2008 | 11:31 AM
  #74  
superglue's Avatar
n00b post whore
 
Joined: Mar 2008
Posts: 535
Likes: 0
From: San Jose, CA
^^^^

AKA engine brake

To down shift into a lower gear and use the engine's compression to slow down the car as opposed to pressing in the clutch (or shifting to neutral) and riding the brakes. It's not recommended as it puts unnecessary wear on the drive train. Brake pads and rotors are much easier to replace than transmission components.
Reply
Old May 30, 2008 | 11:34 AM
  #75  
fahrfegneugen's Avatar
Registered
 
Joined: Jan 2008
Posts: 1,467
Likes: 1
From: Wash/Idaho
Whatever... I guess that makes sense, and if you drive an auto, you just use the brakes...
Reply


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -5. The time now is 09:25 PM.