370z requires premium fuel?
 

That is what I have read in some of the reviews. Is this accurate? Do we have the vehicle manual on the website?

Thanks

Premium fuel is needed. 91 octane and above.

Owner's Manual linky....

http://www.the370z.com/images/370zfo...he370Z_com.pdf

One word... Yes

If Civics (the Civic Si) nowadays require premium fuel, I'd assume the 370z would definitely require it too haha.

Anything that is high compression or force induction should always use premium. High compression is about 10:1 and up. I believe the these motors are 11:1.

Absolutely they need premium (as has the 350s and for that matter, most of Nissan's/Infiniti's offerings that use either a 6 or 8 cylinder).

If you use anything other than premium, you will likely see less performance as the CUP backs-down the engine to prevent premature ignition (knock).

Speaking of fuel choice.. see what happens when you use XXX 138 oxygenated blend :)

XXX Racing Fuel gains 14whp on stock 370Z : Injected Performance Blog

http://farm4.static.flickr.com/3385/...c4d934.jpg?v=0

^impressive

LOL! That's a good way to empty out the cats too! :D

Could you explain what that means "high compressions for cars"? I guess I can look it up but I would rather have your professional opionion. :icon17:

LOL! I'm not a professional! :D I do porn, not cars. (FYI)

Compression is the amount of pressure the combustion chambers are under.

The octane level changes the speed and cleanliness of the detonation. Pre-detonation is common on higher compression engine because the fuel will ignite easier. So higher octanes are required to guarantee a specific time for detonation AFTER the piston has reached its apex.

Read this: Engine knocking - Wikipedia, the free encyclopedia <-- That will explain the pre-detonation and let you know why higher octanes are more important on cars with higher compressions.

I see. Thank you. Now this may sound a little dumb, will the 370 require something special or a converter of some sort if you want to put a higher octane on your car? A local gas stations sells 100 octane. Also what if you put c17 or something like that.

91, 92, or 93 octane will be just fine. Don't worry about those higher octanes unless you plan go use forced induction.

I was just wondering. I think the 100 octane is like 6.99 a gallon. Way to rich for my blood. But if you put 100 octane wouldn't it increase the HP a decent amount?

Nope. It just runs with fewer knocks.

100 octane is really meant for MUCH higher compression engines or forced induction.

But it would still be safe if you were to use it right?

Maybe... My experience with higher octanes is that after a while, it screwed up my catalytic converters... It really won't help you if you're running a stock car. You can use it if you want, but I don't think it's good for the cats and it's certainly not good for your wallet.

Yes, it is safe. But not necessary on a naturally aspirated VQ unless you are tuned for it.

I have a 2006 G35 Coupe 6MT with a tune, and one of my maps is tuned for 100 octane. It does yield a few more hp and smoothens out my powerband, but its nothing like forced induction.

I only use my 100 octane performance map when I track the car. Mostly for additional safety since 100 octane would be less likely to knock.

^^^ What he said. :D

Here in England our 'normal' fuel is 95octane - Nissan recommend 'super unleaded', which is 97 or 98octane.

I run my 350z with 98octane (super unleaded) - and tests in at least one car magazine have shown that 98octane increases the horsepower slightly and/or it's more economical than 95octane. Also, the owners' manual for the 350z warns you that you should only use 95octane if you really have to - is this the same for the 370z?

Personally, I wouldn't use anything but super unleaded and I assume it's the same for the 370z.

In addition, I assume that the ECU will adjust itself to account for different fuel types, as I believe it does in the 350z.

Gasoline formulation varies a great deal between the U.S and the U.K. - it even varies here from season to season; region to region and perhaps even city to city.

Thanks for that - your reply prompted me to Wikipedia 'octane rating' - and it's very interesting...

Octane rating - Wikipedia, the free encyclopedia

When E85 becomes more popular in California (if our sh!thead of a governor gets his stupid squishy head out of his lazy republican @ss) I'll be tuning my Z for E85.

I've been reading that people who convert and tune for E85 are making quite a bit more power... And forced induction is safer because the compression for E85 is supposed to be higher for E85.

Any thoughts?

Thoughts? I think that The Cyberdyne Systems Corporation may be monitoring the interwebs and you better be careful about badmouthing the T800 series! :eek:

on the G's....premium fuel is recommended

I've heard really bad stories of ppl putting in regular fuel...car was all jerky and smelly.....idle super rough....bad times

WTF?

That's... well... strange. But hey, I guess I should be more specific, right?

Your governer played the role of the T800 Terminator series in a couple of movies and I was just warning you before he shows up in a time bubble.

:D

He can show up in a bubble and would be welcomed with the following conditions:

He MUST fix the crap he broke

He MUST be wearing clothes when he shows up! LOL

WOW you guys use a lot higher octane than compared to America. wish we had higher octane more available her in Cali. Well we do have them available, but not as many and there expensive as hell.

I use nothing but premium fuel here.

I ran across a website that where the topic of discussion was whether cars used for racing should switch. Here is a quote:
"Driving Habits: If you drive your show/race car just once or twice a year you may want to stay with gas because E85 works like a sponge grabbing all the water it can from the air. So driving some on a weekly basis would be good. If you use E85 keep it moving don't store it! If you need to park your car for long terms you should fill your tank with gas and stabill. This will provide you with some protection from rust and fuel system problems."

Not sure why grabbing all the water from the air would be a bad thing though. Maybe cause of dilution to the oil?

That's a good question. I don't know about that. You're right that there'd be dilution, and there would be a problem when it came time to run the car and your motor gets a gulp of water instead of fuel. But you also have to have special fuel lines for E85, but I'm wondering if they're stainless steel or if they can rust.

Rust is worrying enough, but changing the viscosity of the oil is downright scary. Last thing you want is premature wear because of a change to the oil. Obviously I wouldn't make the change until the car is out of warranty, but it's definitely worth looking into because you're right; you can get good power out of E85.

If you tune for both, you should be able to run both without a problem. The only physical changes you need to make are the fuel lines... They need to be stainless. Aside from that and tuning, there's not much more to converting to E85. I will DEFINITELY be using it when I go forced induction. I'll already be voiding my warranty, and 105 Octane is nice when you're only paying 2.40/gal! :)

Keep us updated as you progress, I'd like to see how that works out.

Yeah. Need to buy the car first! LOL

octain adding
 

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In cal we can only get 92 octane(oc)

To get to 93oc we need to add 100oc unleaded - i,m a little off maybe with mix - but this is close

14 gals 92oc mix 2.5gals. 100oc and then drive 300miles to get the computer up to speed -- my 350Z knocked with 92oc when pushing it on the back back roads.

Some people where having problem with higher mixes then 93.? when driving around town.
More people where having problem with higher mixes then 94.? when driving around town.
Alot of people where having problem with higher mixes then 95 & up when driving around town.


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My T/A knocked at 5500 RPM with 91 or less. I can't imagine that you'd have problems running at low speeds on higher octane levels. Very strange to me.

True, but the amount they pay for their regular gas is probably similar to what we would pay for race type fuel. We have it cheap compared to most of the world.

In Germany, right now they're paying around $8.50/gal :eek:

Venezuela on the other hand.... $.12/gal :yum: