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Rx-8 >= 350z

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Old 06-23-2011, 03:15 AM
  #26  
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Yeah right when I start up I turn DSC and TCS off. No need for it on.
Old 06-23-2011, 04:53 AM
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Originally Posted by 40w8
I can warm up, idle while I throw trash and get mail, go to the store at 35 mph (lights-stop and go), and when I get home after that 5 mile round trip my scan guage says 19.6 mpg for the day warm up and all. I've gotten 27.1 @75 on a full tank several times.
I get similar fuel consumption on my 2009 sport a/t, with an overall average of around 23-24 mpg.

And, for those taking issue with "poor" relative fuel consumption, here are the independent EPA test ratings to objectively compare the 350z and RX-8 :

http://www.fueleconomy.gov/feg/noframes/21654.shtml

http://www.fueleconomy.gov/feg/noframes/21752.shtml

With automatic transmissions, they are virtually the same, with the Nissan having a slight advantage in the city rating. The RX-8 with manual transmission compares a bit less favorably due to its significantly lower gearing / higher revving.
Old 06-23-2011, 05:15 AM
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I do not have TCS on my Eight so that is why it was not in the compare. The Z did but was a Enthusiasts model which was a higher trim level. The 350 also had Xenon lights too. You can't even buy a base Z with AT. Both Options I do not really miss.

Originally Posted by xexok
TCS and DSC isn’t really that big of a deal, I love driving my rx8 and its missing both of those. :P


I had the lights professionally cleared at the dealer and then went back over it later with Meguiar's Plastx. It still has a white film.

You don't need to take apart the lenses to try and clean them, first try what I did!

Go to Walmart and purchase the Turtle Wax headlight lens restorer. It's a $10 fix and it worked like I would have never imagined. Below you can see my before and after pics.

The good thing about this product is that you should take before and after pictures because on the box, Turtle Wax offers a money back guarantee with pictures if you are not satisfied!
Old 06-23-2011, 05:17 AM
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Yea 6 speed rx8s for sure have the better mpg. I got 22 mpg average with a 700 mile trip all highway doing 75-85 in a manual rx8 so I assume it could have been a bit better if I stayed at 55 mph but thats no fun and risky on a 75 mph highway lol.
Old 06-23-2011, 05:27 AM
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I got the same problem. I do a ton of Highway travel and if you go below 75, you ar toast.

Originally Posted by xexok
Yea 6 speed rx8s for sure have the better mpg. I got 22 mpg average with a 700 mile trip all highway doing 75-85 in a manual rx8 so I assume it could have been a bit better if I stayed at 55 mph but thats no fun and risky on a 75 mph highway lol.
Old 06-23-2011, 07:15 AM
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Originally Posted by Kaiser bun
Not totally sure I buy this
Sure it does, I've got a 07 GT with 6spd auto, so EPA said 25 on hwy, and it runs about 2700 rpm @ 80mph vs the 3600-3700rpm's the manuals run.

Lots of other guys have claimed 27 mpg on the open road for a tank (autos).

I'll admit that that 27.1 was with summer fuel on a cool fall day with a 20mph wind to the back part of the way and on half way AC on, but I went to SA in March driving up some hills at 100mph for awhile, and settling down to the 80mph speed limit on I10, and I got 24 mpg.

"Hear me now and believe me later".
Old 06-23-2011, 07:22 AM
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The DSC lies low until you get some tire squirrely so if you're on a mileage run it's not gonna drag brake to ruin gas mileage.

I like it on the track because it leaves you alone unless it needs to step in, and it saved the car at least 3 times from going off when I waited too late to brake.

I ran in the drizzle with a very slick track at up to 70mph when normal speed was 90mph, and I was one of the few that stayed on the track all day.
Old 06-23-2011, 07:35 AM
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Yeah my DSC has saved the *** end of my car twice when going too fast on wet roads and not braking properly (I was still earning how to drive the 8 at the time). It kicks in when you need it and allows for the car to be VERY forgiving.

I only turn it on when it's raining/snowing, gives me piece of mind even if I never need it.
Old 06-23-2011, 08:04 AM
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Originally Posted by Stars25
You don't need to take apart the lenses to try and clean them, first try what I did!

Go to Walmart and purchase the Turtle Wax headlight lens restorer. It's a $10 fix and it worked like I would have never imagined. Below you can see my before and after pics.

Well if the contamination is inside the lens, no matter how well you polish the outside, it won't fix it, would it? But you do raise a good point though.

OP, determine if the contamination is on the outside or inside by first cleaning/polishing the outside, then go somewhere a bit dark and turn on your headlamps. Turning them on lets you see (easier) where the contamination is.
Old 06-23-2011, 08:10 AM
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Now it's a discussion on DSC? I don't understand the need to turn them off on public roads. The DSC system has a pretty high threshold. If you do manage to make it kick in, I think you should be saving those types of maneuvers for the track, unless you're doing donuts in a parking lot or practicing drift control in a remote back road.
Old 06-23-2011, 08:37 AM
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Nub question:
When the DSC "kicks on" do any lights flash? Like when TCS kicks on?
I normally drive with DCS off unless it's raining. And I normally drive like a old lady when it's raining, so I'm not sure if I ever seen it in action.
Old 06-23-2011, 08:57 AM
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Originally Posted by Kaiser bun
Not totally sure I buy this
I dunno. I've gotten 25-26 mpg on a tank before driving freeway miles the entire tank. That 70-75 mph seems to be the sweet spot.
Old 06-23-2011, 05:19 PM
  #38  
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Originally Posted by xexok
TCS and DSC isnt really that big of a deal, I love driving my rx8 and its missing both of those. :P
Nah not really a big deal at all. Just the biggest leap forward in car safety since the airbag or seatbelt.

But it is more fun with those off on a CLOSED road.
Old 06-23-2011, 07:42 PM
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Originally Posted by Are-Ex-Eight
Nah not really a big deal at all. Just the biggest leap forward in car safety since the airbag or seatbelt.

But it is more fun with those off on a CLOSED road.
I wouldn't know, Mazda chose not to include them in sport models. It cant be that big of a deal with safety if its something they are willing to take out. The car is a little bad in the rain but nothing that cannot be controlled with a lighter foot.
Old 06-23-2011, 08:42 PM
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I also had a 350 (6speed), I loved that car and I really wanted to keep it but it didn't work out. I agreed with your right up for the most part other than the good gas milage. Although maybe I was just speeding everywhere =P
And I turn off my DSC as soon as I put my seat belt on every time I drive.
Old 06-23-2011, 11:43 PM
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Originally Posted by xexok
I assume it could have been a bit better if I stayed at 55 mph but thats no fun and risky on a 75 mph highway lol.
I believe you'll actually get better mpg at 75 mph than 55 mph. With most cars that's probably not the case, but I believe it is with the rx8.
Old 06-24-2011, 04:20 AM
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Originally Posted by Roidz24
I believe you'll actually get better mpg at 75 mph than 55 mph. With most cars that's probably not the case, but I believe it is with the rx8.

Especially with the Auto since it's geared up real high.

I agree 75 is a sweet spot for my 6spd auto, and even my Dakota PU, but if the wind is in front it's hard to tell.
Old 06-24-2011, 06:28 AM
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+1 on that.

Originally Posted by 40w8
Especially with the Auto since it's geared up real high.

I agree 75 is a sweet spot for my 6spd auto, and even my Dakota PU, but if the wind is in front it's hard to tell.
Old 06-24-2011, 06:53 AM
  #44  
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75 is the sweet spot for my 6-speed as well, I net 22~23mpg off that

Last edited by Vlaze; 06-24-2011 at 06:59 AM.
Old 06-24-2011, 08:55 AM
  #45  
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Originally Posted by 1.3_LittersOfFurry
Nub question:
When the DSC "kicks on" do any lights flash? Like when TCS kicks on?
I think they share the same light on the dash, I've definitely seen it when accelerating on a wet road (TCS), and I saw it once when I was taking a turn too hot (DSC, probably).
Old 06-25-2011, 09:23 AM
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This is what my lights look like right now after many attempts to clean them. They have this haze I can't get rid of. I think I need to clean them from the inside like stated above. I hope I didn't over do it, it has a a tacky layer on it.

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Old 06-25-2011, 11:44 AM
  #47  
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Check out one of these discussions: Headlight Restoration, Headlight oxidation.
Old 06-25-2011, 04:44 PM
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Originally Posted by EightCostsMoney
They have this haze I can't get rid of. it has a a tacky layer on it.
Try using Goo Gone... don't forget to wash with soap and water afterwards.
Old 06-25-2011, 05:34 PM
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I'll try that. I'm planning on getting the Turtle wax stuff and trying that out.
Old 06-25-2011, 06:39 PM
  #50  
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He's probably right. I get 20+ on mine in town if I drive it like a sane person....or is it when I drive it like a sane person. How the hell does a sane person drive?????? Oh yeah, thats the guy in the caddy in front of me...well, behind me with the big eyes.....

No BS..I got mid 20's recently on a short road trip at around 70-75 mph


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