Even if possible, by the time you pay for the computer time & engine mods you will have expended the funds to operate the Z on premium for several years.

 

But I'm sayin since there is rarily any 91 around here.. Can I use 89 as more normal octane to fill up one?? Or should I just go after the 93?? It's good to know if I havta use 93 and I come into a station with 91 that I can mix with the 91. But if I can use the 89 I would do that. (No Flame on not having money for gas. I do.. Just for 40 cents a gallon diff.) If I can get away with 89 as my normal octane I would do that. If not. its w.e.

 

No flaming. Sometimes you have to pump something lower than recommended. It's okay to pump it. The ECU is also smart enough to recognize it, but if you punch the throttle with below the recommended octane, then it's asking to cause harm to the engine. Also I am sure you know that prolong uses of 89 or lower will only do harm to the engine. Again, if 89 is the only octane in the area, then anybody including me will not hesitate to pump it. There are a few uninformed people think that using octane booster would help, but it's crap if you are using it to boost the 89 octane. Octane booster usually boost a .1 of the grade.... making it something like 89.1 octane.

 

Yea thats the answer I kinda needed. So basically I should be running 93 octane since 91 is hard to come by around my way.. But if I find a 91 octane pump. I should use that instead of the 93 since its safe and would cause no harm to mix the 2.

 

There is a thread where someone converted the engine to suck in carbon dixoide pollutants and it returns to the exhaust as pure oxygen and h20. pretty amazing. you can kiss your fuel consumption days goodbye!! do a search.

93 octane....PSSSH. that stuff is so old skoool.

Let us know how it goes.

 

Since you think you know, i will let you know the truth. No it willnot harm your car. Your ECU will just retard the timing and you just willnot have the full power our cars will put out with 91 octane.

 

So that means that anything lower is okay since the ECU will retard that timing. Why so many questions like this one always ask about trying to save $2/tank?

 

I wish I even no.. I didn't mean my question in terms of saving money. I was just wondering about the effects of doing it.. I've been using 93 octane even in my turbo'd civic. So the price of the octane dsn't mean crap to me..

 

Yes its Ok , but you will loose some HP( a dyno run would actually tell you how much) and save $2. Long term harm, a couple thousand less miles on your plugs if that.
BTW 87 octane is typically a better fuel since it is more commonly used. 91 and higher tend to sit long and have more deposits.
For the record i personally use 91 and have been meaning to try 89 for a tank or two one of these days.

 

91? Where can you find that???

 

Cali , Nevada and other states. Use what you have in your area. If you have 93 or 92 your fine.

 

To answer OP: You can retard the timing of your car to 13 degrees to run 87/89 (any Nissan tech can do it in 1 minute). But you'd be a damn fool to purposely rob performance out of a sports car for a measly $2. In fact, I actually advanced my timing which prevents it from ever running on anything less than 91, until I have it reprogrammed back to normal.

 

93... South East!

 

And how do you get that done, is the performance better? no harm done?

 

What gas stations by us actually give 91?? Juss hess right?? Or am I thinking bp?? Lemme no lol.

 

Start Your Search Here: 100 Most Asked Questions.

https://my350z.com/forum/2003-2009-nissan-350z/197329-the-top-100-common-questions.html

 

Oh, I wouldn't know. I was just saying. My baby only gets 93.

Hell, the beater I learned to drive 5 year ago was a 93 Ford Tempo...and that sh*t still got 93 too. Hahaha.

 

If you are that worried about the cost of gas don't buy a sports car. You cant afford it. I am not being a ***** but if you are concerned about the price of gas my guess is you are not in the market for a Z.

 

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.

 

if your that cheap dont get into modding the car for gods sake lol