Where are you going to fill up?

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

Hi-Step'n370Z · 05-13-2010, 05:08 PM

I've been running Sonoco 91 octane, but after reading the posts, I'm going to look for a chevron, texaco or shell station.

I THINK they all use ethanol though, not sure.

Drexster · 05-14-2010, 10:54 AM

I don't mind spending the extra dollars on my gas. If they sold 110 I'd probably buy that instead

NOTE Chevron pumps in BC have a label on them stating "no ethanol".

IDZRVIT · 05-15-2010, 08:54 AM

The calorific value, amount of energy stored in the fuel, is not affected by octane additives. That's why we tune for more aggressive timing schedules and lower AFR's to get the most energy out of the gas and higher octane gas can assist in achieving more aggressive timing schedules.

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.

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?

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...

6MT · 05-17-2010, 03:18 PM

This thread is getting to sound like the oil threads.

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. "

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...

Sibze · 05-20-2010, 11:17 AM

I was over at a Sunoco yesterday. Apparently because Suncor has bought Petro-Canada they had too much of a market share so they needed to sell some Sunoco locations to Husky. Suncor has decided to keep the Petro-Canada name rather than the Sunoco name so in the next few months we will no longer have Sunoco in Canada rather it will be under the Petro-Canada name.

I also asked about the 94 octane. Only select stations will now have 94.

Ztoon · 05-20-2010, 11:50 AM

I prefer Chevron 94 as it's guaranteed no ethanol.
Can also set UpRev map for 91 or 94.

05-15-2010, 08:54 AM	#4 (permalink)
IDZRVIT A True Z Fanatic Join Date: May 2009 Location: Halifax Posts: 1,659 Drives: '13 CTS-V, '76 Vette Rep Power: 28	The calorific value, amount of energy stored in the fuel, is not affected by octane additives. That's why we tune for more aggressive timing schedules and lower AFR's to get the most energy out of the gas and higher octane gas can assist in achieving more aggressive timing schedules. __________________ "America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP

05-17-2010, 03:18 PM	#8 (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	#9 (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	#10 (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.

05-20-2010, 11:50 AM	#14 (permalink)
Ztoon Track Member Join Date: Aug 2009 Location: B.C. Posts: 578 Drives: '09 370a7 Rep Power: 25	I prefer Chevron 94 as it's guaranteed no ethanol. Can also set UpRev map for 91 or 94. __________________ Stillen G3\|CBE\|ground kit, F.I. H.F.C., C.F. fangs\|mirrors\|pillars, Hotchkis, SSR Type-F, RE-11, UpRev, BC BR coilovers 15% tint, LED black hdlts, color match handles, Dynamat, tail lt. tint, Mines C.F. frt. lip\|rear spoiler, Amuse rear,skirts, vented fenders, c.f. vented hood, gloss blk. roof

05-13-2010, 05:08 PM	#2 (permalink)
Hi-Step'n370Z Enthusiast Member Join Date: Dec 2009 Location: new york Posts: 425 Drives: '10ZR S/B AT Tour NV Rep Power: 278	I've been running Sonoco 91 octane, but after reading the posts, I'm going to look for a chevron, texaco or shell station. I THINK they all use ethanol though, not sure.

05-14-2010, 10:54 AM	#3 (permalink)
Drexster Base Member Join Date: Jan 2010 Location: Vancouver, Canada Posts: 34 Drives: 40th Anniversary Rep Power: 16	I don't mind spending the extra dollars on my gas. If they sold 110 I'd probably buy that instead NOTE Chevron pumps in BC have a label on them stating "no ethanol".

05-18-2010, 12:16 PM	#11 (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!!!

05-20-2010, 11:17 AM	#13 (permalink)
Sibze A True Z Fanatic Join Date: May 2009 Location: Ontario, Canada Posts: 16,202 Drives: In your way Rep Power: 64	I was over at a Sunoco yesterday. Apparently because Suncor has bought Petro-Canada they had too much of a market share so they needed to sell some Sunoco locations to Husky. Suncor has decided to keep the Petro-Canada name rather than the Sunoco name so in the next few months we will no longer have Sunoco in Canada rather it will be under the Petro-Canada name. I also asked about the 94 octane. Only select stations will now have 94.

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