Grade of fuel - Page 4 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Autobot · 02-15-2010, 06:00 PM

Quote:

Originally Posted by Bogey99

I found a place that has 100 at the pump too. A previously mentioned by others, would running a few gallons of it be the practical thing to do or can you run a full tank of it? I guess my question would be "Is it safe to run a tank of that stuff every once in a while"?

I run straight VP100 but I had the car tuned for 96 octane VP100 motor rating is 96.
http://www.vpracingfuels.com/vp100%2...?lnum=16768446
But I had also ran it straight before the tune and could still tell the difference.

2ndgenz28 · 02-15-2010, 06:22 PM

Quote:

Originally Posted by Phantom.5SS

so thats all I run in the Camaro...93 No Ethanol------$4.00 a gallon.

Any chance you want to buy a bridge???

$4 gas has been long gone here

13 ZL1 · 02-21-2010, 08:42 PM

Quote:

Originally Posted by Bogey99

I found a place that has 100 at the pump too. A previously mentioned by others, would running a few gallons of it be the practical thing to do or can you run a full tank of it? I guess my question would be "Is it safe to run a tank of that stuff every once in a while"?

I think the best thing to do would be to add a few gallons of 100 with the balance at 91 on every fill up. I calculated that 4 gallons of 100 plus 14.8 gallons of 91 averages to 92.8.

04Ram2500Hemi · 02-21-2010, 08:46 PM

What does the owners manual say about the SS? I won't be getting my Camaro until some time in April (it all depends on bow long it takes one I order it March 1st).

IceCreamGuys · 02-21-2010, 09:00 PM

We are at about 6700' here in Wyoming. 91 is about as high a grade fuel as I ever see, without going to the Airport or a racing shop.

JohnInSoCal · 02-21-2010, 09:15 PM

Quote:

Originally Posted by 04Ram2500Hemi

What does the owners manual say about the SS?

it says to use 91 octane, it's what the cars are tuned for from the factory. Using 93 or 100 octane won't hurt but won't give it any more HP or make it faster.

lee · 02-21-2010, 09:18 PM

whats wrong with 87?

Madcat0911 · 02-21-2010, 10:56 PM

Quote:

Originally Posted by lee

whats wrong with 87?

You lose power, and you might get some knocking.

That lose power part is the part that convinces me to not put the cheap stuff in my baby.

04Ram2500Hemi · 02-22-2010, 07:35 AM

Quote:

Originally Posted by JohnInSoCal

it says to use 91 octane, it's what the cars are tuned for from the factory. Using 93 or 100 octane won't hurt but won't give it any more HP or make it faster.

This will be the second vehicle I've purchased that the owners manual tells you to not run the 87. I have to run 89 in my Hemi, and now 91 in my Camaro. LOL- I never get to run the cheap gas like I put in my wife's Honda Pilot!

brtaus · 02-22-2010, 09:15 AM

Quote:

Originally Posted by Madcat0911

You lose power, and you might get some knocking.

That lose power part is the part that convinces me to not put the cheap stuff in my baby.

I was never really a big believer in the differenece in grades of gas until this last fill up. Keep in mind, I have used 91 since I got my car but about 3 months ago, I started using Chevron or Shell exclusively.

Anyway, I was not able to go to my normal Chevron station, so I had to fill up at a Circle K. I still filled up with 91 octance, but I have to say the difference in how my car runs with Chevron to what is in there now is night and day. My car runs a bit rougher, idles a bit rougher and just doesn't feel the same.

I can say this, I will only use Chevron or Shell gas from now on, even if I have to fill up with a half tank remaining.

mmongi7 · 02-22-2010, 10:47 AM

Chevron Supreme! Always get the best that you can.

brtaus · 02-22-2010, 10:53 AM

Quote:

Originally Posted by mmongi7

Chevron Supreme! Always get the best that you can.

Will never get anything different from now on.

TooCool5 · 02-22-2010, 11:43 AM

Search search its so easy.

MiniMedic361 · 02-22-2010, 11:55 AM

A fuel with a higher octane rating can be run at a higher compression ratio without causing detonation. Compression is directly related to power, so engines that require higher octane usually deliver more motive power. Engine power is a function of the fuel, as well as the engine design, and is related to octane rating of the fuel. Power is limited by the maximum amount of fuel-air mixture that can be forced into the combustion chamber. When the throttle is partially open, only a small fraction of the total available power is produced because the manifold is operating at pressures far below atmospheric. In this case, the octane requirement is far lower than when the throttle is opened fully and the manifold pressure increases to atmospheric pressure, or higher in the case of supercharged or turbocharged engines. Many high-performance engines are designed to operate with a high maximum compression, and thus demand high-octane premium gasoline. A common misconception is that power output or fuel mileage can be improved by burning higher octane fuel than a particular engine was designed for. The power output of an engine depends in part on the energy density of its fuel, but similar fuels with different octane ratings have similar density. Since switching to a higher octane fuel does not add any more hydrocarbon content or oxygen, the engine cannot produce more power. However, burning fuel with a lower octane rating than required by the engine often reduces power output and efficiency one way or another. If the engine begins to detonate (knock), that reduces power and efficiency for the reasons stated above. Many modern car engines feature a knock sensor – a small piezoelectric microphone which detects knock, and then sends a signal to the engine control unit to retard the ignition timing. Retarding the ignition timing reduces the tendency to detonate, but also reduces power output and fuel efficiency (Thanks Wikipedia!!!)

02-21-2010, 09:00 PM	#47
IceCreamGuys Drives: 2010 IOM 2SS/RS Join Date: Feb 2010 Location: Wyoming Posts: 43	High Elevation We are at about 6700' here in Wyoming. 91 is about as high a grade fuel as I ever see, without going to the Airport or a racing shop.

02-22-2010, 10:47 AM	#53
mmongi7 Drives: 2010 Camaro 2LT Join Date: Jan 2010 Location: Oregon Posts: 229 View My Garage	Chevron Supreme! Always get the best that you can. __________________ Camaro 5 Fest here I come!

02-22-2010, 11:43 AM	#55
TooCool5 Drives: 2010 Camaro 1LS 3.6 LLT V6 325 HP Join Date: May 2009 Location: LS Posts: 4,244 View My Garage	Search search its so easy. __________________ 2010 Camaro Auto, Inferno Orange, Titanium Interior, Gearhead Wheels AIRAID CAI

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02-21-2010, 08:46 PM	#46
04Ram2500Hemi Drives: 04 Ram 2500 & 2010 Camaro 2SS/RS Join Date: Feb 2010 Location: Missoula, Montana Posts: 1,301	What does the owners manual say about the SS? I won't be getting my Camaro until some time in April (it all depends on bow long it takes one I order it March 1st).

02-21-2010, 09:18 PM	#49
lee Drives: 2010 2ss/rs Join Date: Sep 2009 Location: Austin Posts: 1,016	whats wrong with 87?

02-22-2010, 11:55 AM	#56
MiniMedic361 Drives: 2010 2SS Summit White Camaro Join Date: Feb 2010 Location: NC Posts: 10 View My Garage	A fuel with a higher octane rating can be run at a higher compression ratio without causing detonation. Compression is directly related to power, so engines that require higher octane usually deliver more motive power. Engine power is a function of the fuel, as well as the engine design, and is related to octane rating of the fuel. Power is limited by the maximum amount of fuel-air mixture that can be forced into the combustion chamber. When the throttle is partially open, only a small fraction of the total available power is produced because the manifold is operating at pressures far below atmospheric. In this case, the octane requirement is far lower than when the throttle is opened fully and the manifold pressure increases to atmospheric pressure, or higher in the case of supercharged or turbocharged engines. Many high-performance engines are designed to operate with a high maximum compression, and thus demand high-octane premium gasoline. A common misconception is that power output or fuel mileage can be improved by burning higher octane fuel than a particular engine was designed for. The power output of an engine depends in part on the energy density of its fuel, but similar fuels with different octane ratings have similar density. Since switching to a higher octane fuel does not add any more hydrocarbon content or oxygen, the engine cannot produce more power. However, burning fuel with a lower octane rating than required by the engine often reduces power output and efficiency one way or another. If the engine begins to detonate (knock), that reduces power and efficiency for the reasons stated above. Many modern car engines feature a knock sensor – a small piezoelectric microphone which detects knock, and then sends a signal to the engine control unit to retard the ignition timing. Retarding the ignition timing reduces the tendency to detonate, but also reduces power output and fuel efficiency (Thanks Wikipedia!!!)