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Switching Gas??

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Old 12-10-2007, 03:03 PM
  #41  
jerry_2612
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Default Diff grades of fuel

Just a curiosity... In Australia 91 is the standard petrol, 95 premium, and 98 octane the super duper petrol. Shell even tried to sell 100 octane for a few months. I'm wondering is, as to why our lowest grade of fuel is the premium in the States and we go as high as 98-100? I mean from what I've been reading it looks like no one here would really hesitate going for 98 if it was available, right? So I'm doubting it's a demand issue.

Wouldn't it also mean that stock for stock our Z's are slightly faster
Old 12-10-2007, 03:07 PM
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mavtais
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Originally Posted by jerry_2612
Just a curiosity... In Australia 91 is the standard petrol, 95 premium, and 98 octane the super duper petrol. Shell even tried to sell 100 octane for a few months. I'm wondering is, as to why our lowest grade of fuel is the premium in the States and we go as high as 98-100? I mean from what I've been reading it looks like no one here would really hesitate going for 98 if it was available, right? So I'm doubting it's a demand issue.

Wouldn't it also mean that stock for stock our Z's are slightly faster
That's probably true that your Zs are faster because you get more pressure from the higher octane. In Japan, they rate the S2000 at 250ps, but here we only get 240 because we get 91 and Japan gets higher.
Something stupid happened in NNA Marketing department, and they over-rated our Zs with 287hp, but in Japan it's only rated at 280ps using a higher octane fuel. Figures don't lie, but liars do figure.
Old 12-10-2007, 03:24 PM
  #43  
JonsilvZ
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Sunoco used to have ultra 94. Now its all 93oct. I always use BP 93 in both cars. They seem to like it! I think all the major brands are good.
Old 12-10-2007, 03:31 PM
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shadykilla717
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Originally Posted by Arnold K.
You can do it a variety of ways, but the easiest is by using a Nissan Consult II tool which most service techs should have. Slip one of them a 20 and ask him to advance your timing to 17 degrees. You'll get improved throttle response, and you should notice a little more power through out the entire powerband. And there are no draw backs to this at all, it's still within recommended spec.

So ummm. Which Nissan you go to?? Wanna take a ride wit me?? Does it help or make mpg worse??
Old 12-10-2007, 03:33 PM
  #45  
shadykilla717
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Originally Posted by JonsilvZ
Sunoco used to have ultra 94. Now its all 93oct. I always use BP 93 in both cars. They seem to like it! I think all the major brands are good.

I use either mobile or bp.... Love it.... I would rather drive 5 mins longer and pass 2 no named spots to find a named place then a no-named. I learned that the no-names put **** in there gas like water n stuff so they have more gas and can drop the price.. It's all garbage..
Old 12-10-2007, 03:34 PM
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SniperHunter
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Originally Posted by mavtais
That's probably true that your Zs are faster because you get more pressure from the higher octane. In Japan, they rate the S2000 at 250ps, but here we only get 240 because we get 91 and Japan gets higher.
Something stupid happened in NNA Marketing department, and they over-rated our Zs with 287hp, but in Japan it's only rated at 280ps using a higher octane fuel. Figures don't lie, but liars do figure.
Australia uses a different measuring method for gasoline, as far as I know.
Old 12-10-2007, 03:42 PM
  #47  
JonsilvZ
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Originally Posted by shadykilla717
I use either mobile or bp.... Love it.... I would rather drive 5 mins longer and pass 2 no named spots to find a named place then a no-named. I learned that the no-names put **** in there gas like water n stuff so they have more gas and can drop the price.. It's all garbage..
Your smart
Old 12-11-2007, 07:18 AM
  #48  
Fairly Z
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If you're really that concerned about spending the money on gas, you can alternate back and forth between 89 and 93 octane, as long as you fill it once the tank reaches half or a quarter left. That keeps a nice balance of around 90 to 91 octane. But, honestly, I just fill it with 93. If I wasn't going to spend money, I wouldn't have bought a sports car.
Old 12-11-2007, 10:23 AM
  #49  
redlude97
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Originally Posted by RedLine 350z
Yes, you can mix both or even of lesser grade, but I wouldn't mix with lesser grade unless I'm out in the boonies and there's nothing higher than 89. Also avoid fuel that have detergent in it. It just sound like you get less fuel with the additional detergent. Not sure how reliable those detergent really are or probably more like fillers.
Avoiding gasoline without detergents would be impossible, they all have them. Avoiding stations that use more detergent is also dumb since all the major brands add extra detergent, its not a filler because its more expensive than the gasoline portion. If you want a product with less detergents, then stick to the no-names and ARCO. Come back in a year and let us know how your fuel system liked it
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