Where are you going to fill up?

Sibze · 05-15-2010, 02:58 PM

Quote:

Originally Posted by DjSquall

So I made the switch to 94 octane... Now it feels like I'm driving a jet plane.

lol you might want to go back to 91... 94 = less power not more...

Reality · 05-17-2010, 02:24 PM

Quote:

Originally Posted by Sibze

lol you might want to go back to 91... 94 = less power not more...

L O L!
-Could you please provide documented evidence, which proves this?
Kthx

Sibze · 05-17-2010, 02:30 PM

The idea of octane level:

Octane delays the ignition of the fuel. So if you have 87 octane in a car it will ignite sooner than if you have 91 in a car or 94...

The lower octane level you CAN run in a car the more performance you get because the fuel is igniting sooner. However engines like ours need to build up enough pressure before the fuel can ignite and therefore our cars need 91 octane. If you put 87 in our car the fuel will ignite too soon and cause knocking and if you put 94 in the car, the fuel is not igniting at the prime time I.E its actually delaying ignition.

Also:

Quote:

Originally Posted by FricFrac

Whoa hold on guys - you are wasting your money running 94 octane. I was under the same delusion for a long time. You get more power out of lower octane fuel but we need to run 91 to keep the engine from knocking because of our high compression. 91 is optimum whereas 94 is only needed if your car is pinging or knocking and if your 370Z is knocking on 91 you have either bad fuel or a problem with your car.... unless of course your car is boosted then you're gonna want to run 94 or higher

One more:

Quote:

Originally Posted by kannibul

You are totally wrong, and 93 is not better.

Octane rating has everything to do with how slowly the fuel burns and how resistant it is to detonating under compression. Higher octane = slower burn/more resistant.

This is compensated by advancing the timing. The car is "programmed" to use 91 octane fuel, meaning the advanced timing is already active. Using higher octane gas yeilds no benefit as the car can't detect higher rated fuel. *(this is true of all vehicles!)

If the car detects knock, (either by detonation or by the fuel burning too quickly/early by using under-91 octane fuel), the car WILL retard the timing and enrichen the fuel map until the condition is minimized.

That said, it says PLAIN AS DAY in the manual to use 91 octane (or higher) gasoline (again, not because higher octane gas will increase performance, but because it's safer in the sense that it's less likely to knock/detonate), but in case of emergency you can use 87/89 octane, but do not fill the tank, do not drive the car "hard", and fill the tank with 91 as soon as it is available.

So, RTFM.

6MT · 05-17-2010, 03:18 PM

This thread is getting to sound like the oil threads.

IDZRVIT · 05-17-2010, 04:56 PM

Quote:

Originally Posted by Sibze

The idea of octane level:

Octane delays the ignition of the fuel. So if you have 87 octane in a car it will ignite sooner than if you have 91 in a car or 94...

The lower octane level you CAN run in a car the more performance you get because the fuel is igniting sooner. However engines like ours need to build up enough pressure before the fuel can ignite and therefore our cars need 91 octane. If you put 87 in our car the fuel will ignite too soon and cause knocking and if you put 94 in the car, the fuel is not igniting at the prime time I.E its actually delaying ignition.

Sibze, may I ask what qualifications you have to make your statement?

Sibze · 05-17-2010, 05:01 PM

Ok cool, Show me I am wrong. Please

http://www.wisegeek.com/what-is-high-octane-fuel.htm

http://www.ftc.gov/bcp/edu/pubs/cons...tos/aut12.shtm

http://www.saltwatersportsman.com/ar...board-Gasoline

I like this part in the first link:
"Basically, you’re wasting your money if you buy high octane fuel. You should start off with the octane level your car’s manual calls for; if you still hear knocking or pinging, you might try the next step up. If the problem persists, you’ll probably need to have a tune-up or some diagnostic work done. Don’t think that putting high octane fuel in your little Toyota will make it run like a race car – it just doesn’t work that way."

Ok lets see something that says I am wrong... I will switch tomorrow if 93 is going to make my car faster...

Sibze · 05-17-2010, 08:28 PM

Edit: I found a really good link.... http://www.wanderings.net/notebook/M...sWorthTheMoney

"Does High Octane Gas Give More Power?
No. Unless your car is explicitly designed for high octane gas (see your car's manual), using a high octane gas will NOT improve the power output of your engine. Again, the octane rating relates to how much energy it takes to ignite the gas, but NOT directly to how much energy the gas puts out. "

Snakes709 · 05-17-2010, 08:42 PM

Quote:

Originally Posted by ssqpolo

^^most gases nowadays have like 10% or less ethanol. DO NOT FILL WITH E85!.
anyway, i fill with shell or chevron always. premium obviously

As far as i know, theres no stations around here that sells E85, if there was i would have had my old car tuned for it..lol

FricFrac · 05-18-2010, 11:56 AM

Quote:

Originally Posted by IDZRVIT

Sibze, may I ask what qualifications you have to make your statement?

That's kind of like asking someone who isn't a doctor what qualifications they have to claim that eight glasses of water a day is good for you. It's fairly common knowledge - enough that you don't really need to be an expert to make the statement. A simple Google search should give you hundreds of articles on the topic...

Sibze · 05-18-2010, 12:16 PM

Thank you FricFrac!!!

FricFrac · 05-18-2010, 01:38 PM

Quote:

Originally Posted by Sibze

Thank you FricFrac!!!

Lol - I'm not trying to be harsh. Most people assume - I did for years and years. Someone told me it didn't work that way but it was so ingrained in my brain that I though he was out to lunch till I started looking into it...

40th370z · 05-19-2010, 10:09 AM

Quote:

Originally Posted by Drexster

Chevron is the only fuel provider in British Columbia that i know of that has 94 octane fuel. I've heard Husky has some 94 but it's ethanol blended.

$1.20 a liter for the 91 Octane

$1.23 a liter for the 94 Octane on,my weapon of choice, May 19th

6MT · 05-19-2010, 01:51 PM

Quote:

Originally Posted by 40th370z

$1.20 a liter for the 91 Octane

$1.23 a liter for the 94 Octane on,my weapon of choice, May 19th

Cough, cough... Oh you easterners. Today I filled up at $93.9/L for 94.

(the stuff grows on trees here in Alberta

)

40th370z · 05-20-2010, 12:51 AM

Quote:

Originally Posted by 6MT

Cough, cough... Oh you easterners. Today I filled up at $93.9/L for 94.

(the stuff grows on trees here in Alberta

)

B.C. is West of you ,an it actually has trees....

6MT · 05-20-2010, 08:46 AM

Quote:

Originally Posted by 40th370z

B.C. is West of you ,an it actually has trees....

You should probably show more than just "Canada" in your location.

05-17-2010, 03:18 PM	#34 (permalink)
6MT A True Z Fanatic Join Date: May 2009 Location: ITU Zone 2 Posts: 22,459 Drives: Reliant Robin Rep Power: 1791	This thread is getting to sound like the oil threads. __________________ Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D

05-17-2010, 05:01 PM	#36 (permalink)
Sibze A True Z Fanatic Join Date: May 2009 Location: Ontario, Canada Posts: 16,202 Drives: In your way Rep Power: 64	Ok cool, Show me I am wrong. Please http://www.wisegeek.com/what-is-high-octane-fuel.htm http://www.ftc.gov/bcp/edu/pubs/cons...tos/aut12.shtm http://www.saltwatersportsman.com/ar...board-Gasoline I like this part in the first link: "Basically, you’re wasting your money if you buy high octane fuel. You should start off with the octane level your car’s manual calls for; if you still hear knocking or pinging, you might try the next step up. If the problem persists, you’ll probably need to have a tune-up or some diagnostic work done. Don’t think that putting high octane fuel in your little Toyota will make it run like a race car – it just doesn’t work that way." Ok lets see something that says I am wrong... I will switch tomorrow if 93 is going to make my car faster... Last edited by Sibze; 05-17-2010 at 05:15 PM.

05-17-2010, 08:28 PM	#37 (permalink)
Sibze A True Z Fanatic Join Date: May 2009 Location: Ontario, Canada Posts: 16,202 Drives: In your way Rep Power: 64	Edit: I found a really good link.... http://www.wanderings.net/notebook/M...sWorthTheMoney "Does High Octane Gas Give More Power? No. Unless your car is explicitly designed for high octane gas (see your car's manual), using a high octane gas will NOT improve the power output of your engine. Again, the octane rating relates to how much energy it takes to ignite the gas, but NOT directly to how much energy the gas puts out. " Last edited by Sibze; 05-17-2010 at 08:39 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Factory-Fill Oil Analysis Results	ZzzZz	Nissan 370Z General Discussions	0	03-17-2009 01:33 AM

05-18-2010, 12:16 PM	#40 (permalink)
Sibze A True Z Fanatic Join Date: May 2009 Location: Ontario, Canada Posts: 16,202 Drives: In your way Rep Power: 64	Thank you FricFrac!!!