octane - Page 5 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

silversleeper · 04-08-2022, 09:43 PM

v6 buyers are less likely to want to be forced into $ high octane for an extra 10hp in the tune for most applications.
My v6 Maxima recommends it and makes good hp for older technology (no VVT or direct injection).
One item I didn't add to the list is Variable Valve Timing. Some dynamic compression could be lowered by the VVT tuning. I suspect they do this because to have 11.5 to 1 static compression ratio and run 87 they must have used all the tricks available to them.

morepowerjoe · 04-08-2022, 10:27 PM

Quote:

Originally Posted by NOT A 45

I was always taught to speak less and listen more. I don't know everything that's why I joined this forum. On this topic I do know what I'm talking about....I have spent countless hours at GM's expense to learn how our systems work. When you guys talk of turbo's and superchargers and other modifications you won't hear a peep from me....I don't know that stuff but I want to learn. Yet I see over and over guys here giving bad advice to people. If you don't know what your talking about stay away from your keyboard!

Yeah I a lot of bad advice too but I just hope that people have enough common sense to not take it.

demonspeed · 04-09-2022, 09:24 AM

Quote:

Originally Posted by hudson773

piece of mind, did you read your owners manual. COMPLETELY safe to use regular. read before you speak

It is completely safe if all one does is drive from parking lot to parking lot with their folding chair to get into debates about whose microfiber is better.

In the most simplistic terms, 87 is “safe” in some driving conditions - that does not mean it is the appropriate fuel for most conditions.

gtstorey · 04-09-2022, 10:08 AM

I’m not sure there is any reason for GM to recommend higher octane if it makes no difference at all. But maybe they secretly own the companies that make the additives that boost the octane.

hudson773 · 04-09-2022, 12:25 PM

I can see an enormous law suit to all the companies who recommended using premium for no scientific reason. sort of sounds like everything you are told today

hudson773 · 04-09-2022, 12:28 PM

Quote:

Originally Posted by demonspeed

It is completely safe if all one does is drive from parking lot to parking lot with their folding chair to get into debates about whose microfiber is better.

In the most simplistic terms, 87 is “safe” in some driving conditions - that does not mean it is the appropriate fuel for most conditions.

according to GM IT IS!. under all driving conditions the car is designed for, including high performance driving. you can pay for what you want and fool yourself or watch the tests.

hudson773 · 04-09-2022, 12:32 PM

Quote:

Originally Posted by NOT A 45

It is and I do most often, and it's only because of our fuel management system you can do that. These engines are capable of detecting spark knock and making adjustments accordingly to prevent it. Results are reduced power because it's not operating as designed. Safe, yes but only because GM designed this to reduce warranty repairs! Any German vehicle does not do this! I would advise you to learn a little more about this before you speak!

I built my first engine in 1966, my little toe knows more than you. we were talking about camaros, correct, not foreign crap

redcoats1976 · 04-09-2022, 12:39 PM

checked the manual,V6 is approved for 87 octane.all camaro V8s are recommended at least 91 octane.

Royal Tiger · 04-09-2022, 01:06 PM

He’s gone full megalomaniac arrogant.

demonspeed · 04-09-2022, 01:12 PM

Quote:

Originally Posted by hudson773

according to GM IT IS!. under all driving conditions the car is designed for, including high performance driving. you can pay for what you want and fool yourself or watch the tests.

So what happens when it starts knocking? Just let the computer do its thing and keep on keeping on?

Silveradoss573 · 04-09-2022, 04:55 PM

Quote:

Originally Posted by hudson773

according to GM IT IS!. under all driving conditions the car is designed for, including high performance driving. you can pay for what you want and fool yourself or watch the tests.

Still waiting for the video........

Taken from my owners manual.

redcoats1976 · 04-09-2022, 04:58 PM

Quote:

Originally Posted by Silveradoss573

Still waiting for the video........

Taken from my owners manual.

so you didnt think i could read that?

at least we all know its true now.

Silveradoss573 · 04-09-2022, 05:15 PM

When we send our engine off to Sonny's for a refresh, we'll be sure to inform them that engine masters and hudson773 say that 87 pump gas will be just fine and any more octane is not needed....LMFAO!!!!

FasNuf · 04-09-2022, 06:29 PM

It's simple. GM designed the ECM to use a high octane table for 91 octane or better which the engine is tuned to run as engineered. The low octane table GM put in as a safety margin incase you had 87 or better in the tank by mistake or necessity. The Low table is referenced only after the knock sensors detect knock. When it hears knock, it references the low table and pulls timing to reduce the knocking.

It does not sense what octane gas your running and reference the low table.

It first has to hear knock and knock isn't good for a gas engine.This also reduces the power.

04-09-2022, 05:15 PM	#69
Silveradoss573 Banned Drives: Camaro 1LE Join Date: May 2018 Location: USA Posts: 1,347	When we send our engine off to Sonny's for a refresh, we'll be sure to inform them that engine masters and hudson773 say that 87 pump gas will be just fine and any more octane is not needed....LMFAO!!!! Last edited by Silveradoss573; 04-20-2022 at 10:03 PM.

04-09-2022, 06:29 PM	#70
FasNuf Drives: 2014 Camaro ZL1 Join Date: Jul 2019 Location: Oregon Posts: 1,703 View My Garage	It's simple. GM designed the ECM to use a high octane table for 91 octane or better which the engine is tuned to run as engineered. The low octane table GM put in as a safety margin incase you had 87 or better in the tank by mistake or necessity. The Low table is referenced only after the knock sensors detect knock. When it hears knock, it references the low table and pulls timing to reduce the knocking. It does not sense what octane gas your running and reference the low table. It first has to hear knock and knock isn't good for a gas engine.This also reduces the power. __________________ . . . . https://www.youtube.com/channel/UCgN...etl17hA/videos

04-08-2022, 09:43 PM	#57
silversleeper Big Crow Drives: '13 ZL1 Join Date: Mar 2017 Location: California Posts: 1,551	v6 buyers are less likely to want to be forced into $ high octane for an extra 10hp in the tune for most applications. My v6 Maxima recommends it and makes good hp for older technology (no VVT or direct injection). One item I didn't add to the list is Variable Valve Timing. Some dynamic compression could be lowered by the VVT tuning. I suspect they do this because to have 11.5 to 1 static compression ratio and run 87 they must have used all the tricks available to them.

04-09-2022, 10:08 AM	#60
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,478	I’m not sure there is any reason for GM to recommend higher octane if it makes no difference at all. But maybe they secretly own the companies that make the additives that boost the octane.

04-09-2022, 12:25 PM	#61
hudson773 Account Suspended Drives: 2014 camaro SS Join Date: Jan 2019 Location: nj Posts: 268	I can see an enormous law suit to all the companies who recommended using premium for no scientific reason. sort of sounds like everything you are told today

04-09-2022, 12:39 PM	#64
redcoats1976 Drives: LT W/2LT,blue metallic Join Date: Jul 2016 Location: central florida Posts: 5,042	checked the manual,V6 is approved for 87 octane.all camaro V8s are recommended at least 91 octane.

04-09-2022, 01:06 PM	#65
Royal Tiger Account Suspended Drives: 2013 2SS/RS Convertible Join Date: Apr 2016 Location: Lehigh Valley, PA Posts: 3,873	He’s gone full megalomaniac arrogant.