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2003-2009 Nissan 350Z

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Old Jun 25, 2007 | 04:19 PM
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Default pump gas?

alright, im cheap and broke
i put 87 octane in my car because its cheap, would i notice any difference in horsepower if i put the 92 octane swamp water from kentucky in it??

what about octane boosters to get around 95 or 97 octane, i read somewhere about a magazine putting 100 octane race gas with a buncha bolt ons making close to 350 horse at the wheels naturally aspirated

what gas do you guys fill up with
discuss
Old Jun 25, 2007 | 04:24 PM
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no need to discuss, i doubt you ever read the stickies or searched. everyone on here uses premium 91+ octane.

if you don't want to or can't afford it, then use 87. nobody on here will recommend it though. theres also no way to get 350 hp at the wheels with 100 octane either.
Old Jun 25, 2007 | 04:26 PM
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you realize that it saved you a whole $3 right? If you don't have 3 dollars to spare, seriously consider selling the Z, its monthly payment is too high for you.
Old Jun 25, 2007 | 04:28 PM
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i put 93 octane every time i fill up..87 is no good..your car is made for premium gas only..
Old Jun 25, 2007 | 04:30 PM
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i thought i read it somewhere, maybe my mind is messing with me
happens all the time

redlude97, 3 bucks is enough to go eat at wendys
Old Jun 25, 2007 | 04:31 PM
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I use 91, i've never used anythin more tho...
Old Jun 25, 2007 | 04:35 PM
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read the inside of the gas door PREMIUM UNLEADED FUEL ONLY.
Old Jun 25, 2007 | 04:39 PM
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Yeah... they're being harsh, but its true. The Z holds ~20 gallons of gas. 87 octane is usually ~20 cents cheaper per gallon. You saved all of $4 PER TANK.

Honestly, I think there are many ways to save MUCH more money than that on other things. Selling your Z for a 10 year old Honda Civic would save you tens of thousands of dollars immediately, and you'll save much more by getting better gas mileage.

But if you're dead set on putting low-end gas in a Z, then I guess I'll have to tell you that your gas mileage will decrease with using the 87 octane, so you're probably not going to save as much money as you hope. Plus you're not going to have as much horsepower. Plus you risk damaging or preemptively wearing out your engine/fuel system which will cost you THOUSANDS of dollars, which your $4 per tank WILL NOT be able to cover. To put this in perspective, you'd have to go through ONE THOUSAND tanks to get $4,000, which your new engine may cost you. If you get 300 miles to the tank (perfectly reasonable, unless you never let your foot off of the accelerator), then you'll have to put 300,000 miles on the car to cover the cost of the damage you'll eventually do by putting the cheaper gas in there. Trust me, the car WILL NOT last that long on the cheaper gas.

But, then again, its your money.
Old Jun 25, 2007 | 04:43 PM
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you are driving the wrong car if you are broke.

91 or nothing.
Old Jun 25, 2007 | 04:43 PM
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Originally Posted by Zshazz
Yeah... they're being harsh, but its true. The Z holds ~20 gallons of gas. 87 octane is usually ~20 cents cheaper per gallon. You saved all of $4 PER TANK.

Honestly, I think there are many ways to save MUCH more money than that on other things. Selling your Z for a 10 year old Honda Civic would save you tens of thousands of dollars immediately, and you'll save much more by getting better gas mileage.

But if you're dead set on putting low-end gas in a Z, then I guess I'll have to tell you that your gas mileage will decrease with using the 87 octane, so you're probably not going to save as much money as you hope. Plus you're not going to have as much horsepower. Plus you risk damaging or preemptively wearing out your engine/fuel system which will cost you THOUSANDS of dollars, which your $4 per tank WILL NOT be able to cover. To put this in perspective, you'd have to go through ONE THOUSAND tanks to get $4,000, which your new engine may cost you. If you get 300 miles to the tank (perfectly reasonable, unless you never let your foot off of the accelerator), then you'll have to put 300,000 miles on the car to cover the cost of the damage you'll eventually do by putting the cheaper gas in there. Trust me, the car WILL NOT last that long on the cheaper gas.

But, then again, its your money.
intelligent response, thanks
mostly i was curious if there was a horsepower increase between the octane ratings
Old Jun 25, 2007 | 04:45 PM
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dude if you dont have the money for premium, just sell your car back.


Im broke as hell, no mods after over 4.5 years of ownership but ive never stooped that low. How much money are you really saving?


go donate some sperm, they give you like a $100 for that ****. judging by the calculation above, you should be able to ride that $100 out for atleast 20-25 tanks of premium. get a grip, man(pun intended)
Old Jun 25, 2007 | 04:51 PM
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For horsepower between the octane ratings:

Up to premium grade (~92 octane), you'll see a horsepower increase. However, getting 100 octane will net you next to nothing. This is because the engine's ECU is tuned specifically to take advantage of 92 octane. If you get your ECU reprogrammed for 100 octane, you'll see a bit of extra performance, but probably not much more than 10 horsepower or so (unless you're car has forced induction or *serious* N/A mods).
Old Jun 25, 2007 | 04:54 PM
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Originally Posted by 98MODMTR
Take your car back to the dealership you broke joke.

+1 .....damn this forum is str8 to the point, i love it.....
Old Jun 25, 2007 | 04:56 PM
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well i guess ill burn the rest of the tank off that i have, should be fun
and fill up with 92
ive been using 87 for a while, hopefully theres no damage

thanks for the serious responses guys
Old Jun 25, 2007 | 05:42 PM
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Originally Posted by Zshazz
For horsepower between the octane ratings:

Up to premium grade (~92 octane), you'll see a horsepower increase. However, getting 100 octane will net you next to nothing. This is because the engine's ECU is tuned specifically to take advantage of 92 octane. If you get your ECU reprogrammed for 100 octane, you'll see a bit of extra performance, but probably not much more than 10 horsepower or so (unless you're car has forced induction or *serious* N/A mods).
Agree. Some of dedicated race cars here might use 100 octane fuel. They will also tune with 100 octane fuel.
Old Jun 25, 2007 | 05:51 PM
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Not to mention buying 87 octane in the summer is WORSE than any other time... I have known about "hot fuel" for years... The gas companies know many ways to **** the consumer..

http://www.landlinemag.com/Archives/...s/hot_fuel.htm
Old Jun 25, 2007 | 05:56 PM
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well ive been running 87 in it for 2 oil changes
just had it changed a week or so ago
im not sure what the guy before me used as i didnt buy the car new
Old Jun 25, 2007 | 06:03 PM
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Filling up on anything less that 91 to save $3-$5 on a fill-up is ridiculous! Sell your car and get a Civic because continued use of low octane and high revs will eventually **** something up!
Old Jun 25, 2007 | 07:07 PM
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are we going to go for 5 'buy a civic' jokes? Lets freshen it up a bit guys.



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