I was wondering what Octane is most popular.

I've read in a few places that even if the lower grades are recommended, using higher grades (Despite price) are more fuel efficient as they maintain a cleaner feed, and use less gas overall, while improving your F.E.

Thoughts, fact or lie?

lies

lower grade fuels are easier to burn

higher rated fuels resist pre-ignition combustion better than lower grades, thats why they're used in high compression, high power applications

i use 93

I use 90, the lowest octane at the mohawk gas station is 90 and its the same price as other gas stations 87 octane

94 chevron

wow everyones making me feel cheapo
haha

wow everyones making me feel cheapo
haha

damnit manny..mohawk ..seriously? lol

92 shell vpower

i use 93 premium as stated in my manual to use haha

damnit manny..mohawk ..seriously? lol

lol it's literally a block from my house, i guess i gotta step it up a notch:red:

93 in my little 2.2

i use 94 with octane booster

i use 94 with octane booster

what for?

with the mods i have i can tell the diffrance when i run it and when i dont its not a big diffrance but what ever little edge i can get ill take

what engine do you have?

Now that its spring and i drive me car a lot more than winter i use 93 again, but from November till April i mostly just use 89 or 90

Lsj 2.0 supercharged

100 OR109 UNLEADED 06 sssc stage3

100 OR109 UNLEADED 06 sssc stage3

hell yeah that how we roll lol

93 octane.

Premium in my 2.4, which is 91.

chevron 94 09ss

i use 94 with octane booster

So really 94.1?

:lol:

You're throwing money in a hole for a placebo effect.

i use 300. on a good day it can rise to 400

93 octane. 20 cents higher than 87, so even if you completely fill up, you're only looking at a difference of about 2.50 per tank.

shell 93 on sunday nights, sunoco 91 during the week...

Sunoco Ultra 93 !!!

shell 93 on sunday nights, sunoco 91 during the week...

lol. why the difference in grades between the days? :wtf:

i use sunoco ultra 93 faithfully never fails

93 octane or better

94 petro canada, or 94 sunoco

i run nothing less than C16...









clearly kidding

I run mad high 87. Sometimes I even run 89 (if I feel like time travel, or the gas station doesnt have 87). I figure 89 helps me generate the neccessary 1.21 gigawatts I need.

i run 87........i have a 2.2

if i had an SS......it would be 93 or higher per the owners manual

however, i am curious to see if the gas millage will increase with a higher octane fuel......i plan on filling up with 93 or higher when i go the the d&b meet in 2 weeks

i use 93! what my manual tells me to use!

lol. why the difference in grades between the days? :wtf:

he probably goes to the races sunday night yo! :lol:

premium

I use Mobil 93 or shell v power

my le5 only sips 91-93 : ]

I run 87 octane 99% of the time.
But last night I filled it up with 89 octane, and I know no one believes it, but it ran better and was more responsive.

I did talk to Trifecta and they said the Ecotec motor has two programs of which one is for low and one is for high octane on the 2.2 Ecotec.

It makes sense, the 10.1:1 compression is really borderline to run 87 octane.
I am being cheap and run 87, but then again I am not trying to improve track times or anything like that. My car is just to get me to work and back.

I've been wondering about this as well. Can I safely use 87 in my SS/TC? Will I get better fuel economy with the 87 octane? I know 93 octane tends to be pretty dirty. It soots up the exhaust very quickly.

I've been wondering about this as well. Can I safely use 87 in my SS/TC? Will I get better fuel economy with the 87 octane? I know 93 octane tends to be pretty dirty. It soots up the exhaust very quickly.

Safe? It won't chuck a rod through the block the minute you start it but.....long term you will see excessive knock. This will cause the pcm to knock back timing, fuel, etc thereby costing you power (and mileage). You paid for a turbo car, you want the power, right?

You will get worse mileage with 87. 93 may give you enough mileage gain to offset the higher cost.

93 dirty? The black buildup in your exhaust is unburned fuel (carbon) from running rich. Your car will run rich at wide open throttle, any car will, this is not an issue unless you get a big black cloud out the exhaust anytime you get on it :)

It is NOT dirty fuel. Dirty fuel will clog up filters, not cause carbon buildup in the exhaust.

End of the day, it's your car....run diesel in it if you want :lol:
If I paid top dollar for the turbo (or sc for that matter) I would feed it the highest octane I could find though.

I meant to say 93 octane doesn't burn very "clean", it soots up the exhaust very quickly. You don't have to be running in open loop to have the soot form.

usually put diesel in the LS. makes that some bitch run like a bull.

93 burns as clean as any other octane.

If you are getting more soot with 93 that just means the pcm is adding more fuel, which is making more power, which is kind of the whole point of the tc, no?

You may not be able to hear it but your motor will be knocking on 87. Sustained knock has all kinds of wonderful effects including holed pistons and shattered ring lands, bad shit if you ask me.

If you really want to run 87 get a 2.2, they love that stuff.

f*** man. I use 87. 2.4 ss/na

I've seen excessive soot from every car that uses 93/94 octane even those that are "tuned" to use it. The problem is that the advanced ignition timing isn't at all RPM/load ranges on the table. It's only for certain regions of the spark table. The rest of the time it's just unburnt fuel.

My SS/TC had a sooted up tail pipe tip with 14 miles on the odometer. I polished it up and waxed it (polished T304 SS is awesome), drove it for 4 miles and it was covered in soot again. I'm not complaining , I'm just stating an observation.

I've seen excessive soot from every car that uses 93/94 octane even those that are "tuned" to use it. The problem is that the advanced ignition timing isn't at all RPM/load ranges on the table. It's only for certain regions of the spark table. The rest of the time it's just unburnt fuel.

My SS/TC had a sooted up tail pipe tip with 14 miles on the odometer. I polished it up and waxed it (polished T304 SS is awesome), drove it for 4 miles and it was covered in soot again. I'm not complaining , I'm just stating an observation.

Can't say I have noticed any excess soot, running 92 octane at 3500 feet elevation, stock as it gets. Gets a bit of black between washes but no worse than any other car I have seen.

Maybe something to do with the forced induction? Little over fueling to help keep the temps down? Idk, just tossing ideas here.......

93. I was gonna fill up with 94 from sunoco when I was at the track but I don't think 1 point in an octane level would make a difference.

I put 91 chevron and sometimes run 2-3 gallons of 100 mixed with 91. Only time the car gets less is when my dad takes it. He puts 89 I tell him that to only use 91 but he is stuborn. The dealer gave him a gas card when he picked the car up for me and I told him to put 91. He said it was free and it didn't really matter so he put 89.

lots and lots o' fail. If you are stock, use what's recommended in your manual. If you aren't stock, use what you're tuned for. If you aren't tuned USE WHAT THE STOCK TUNE CALLS FOR UNLESS YOU HAVE INCREASED BOOST AND ARE AFRAID OF DETONATION.

Your car will perform BETTER with the gas it is tuned for. If you think putting c16 in a stock car is going to make it faster, you are sadly mistaken and will end up making the car perform WORSE, increase carbon deposits and waste your money.

Only one station around here has above 91, it's 94 and the only thing I try to use.

SOOT > DETONATION

Only one station around here has above 91, it's 94 and the only thing I try to use.

SOOT > DETONATION

you are not going to detonate on 91, especially with your mods. 94 is fine for your car though. The people that are going to be pissed at themselves are the 2.2's running 93+ on stock tunes and guys running 100 octane on stock tunes :lol: . If they ever decide to make a project out of it and pull the head after a lot of miles, they'll be surprised to see a huge mound of "coal" on the valve faces.

you are not going to detonate on 91, especially with your mods. 94 is fine for your car though. The people that are going to be pissed at themselves are the 2.2's running 93+ on stock tunes and guys running 100 octane on stock tunes :lol: . If they ever decide to make a project out of it and pull the head after a lot of miles, they'll be surprised to see a huge mound of "coal" on the valve faces.

I would normally agree with you, but I get knock retard on my semi-stock SS/TC so I'm trying to be cautious.

I generally don't see any when using 94 octane and my bigger intercooler.

How much KR do you get with 91?

i have a 2.2l so i use regular 87

93 in my little 2.2\

use regular. wasting your money and not getting any benefit by running 93.

i use 94 with octane booster

octane boost is a waste of money, any gains are in your head.

I've been wondering about this as well. Can I safely use 87 in my SS/TC? Will I get better fuel economy with the 87 octane? I know 93 octane tends to be pretty dirty. It soots up the exhaust very quickly.

no, you will get worse fuel economy. in your ss tc you will save money by using premium, because you will get better mileage than you would with regular.

yes, I have shown the math on here before and i'll do it again if someone wants, but with one bottle of your average octane booster, you will increase the overall effective octane level of your whole tank by less than one point :lol:

yes, I have shown the math on here before and i'll do it again if someone wants, but with one bottle of your average octane booster, you will increase the overall effective octane level of your whole tank by less than one point :lol:

Yeah the bottle even says 0.5-1 point. It's more for it's anti-knock properties than Octane boost.

Yeah the bottle even says 0.5-1 point. It's more for it's anti-knock properties than Octane boost.

anti knock is Octane, and vice-versa.....


as for me, leaded Torco 110. and no, i'm not joking.

yes, I have shown the math on here before and i'll do it again if someone wants, but with one bottle of your average octane booster, you will increase the overall effective octane level of your whole tank by less than one point :lol:

well i think most people think that 1 point is like 1 full octane jump up :lol: so if you have 93 octane, put in octane boost, you now have 94 :lol:

I use 93 in both the SKY and the Sunfire GT I tried to use less in both and they both especially the GT ran really really really bad and knocked.

Yeah the bottle even says 0.5-1 point. It's more for it's anti-knock properties than Octane boost.

uhhhhh....say what now?

Isn't it possible to run too high of an octane in a car? just wondering

91 as thatats the highest i have in town

I run 93 shell or mobil or exxon in my car.

BP 93 Ultimate, good stuff :D

93 Ftw

\

use regular. wasting your money and not getting any benefit by running 93.



octane boost is a waste of money, any gains are in your head.



no, you will get worse fuel economy. in your ss tc you will save money by using premium, because you will get better mileage than you would with regular.


...i'm tuned for 93...

anti knock is Octane, and vice-versa.....


as for me, leaded Torco 110. and no, i'm not joking.
Well because you and some other guys are crazy ass bitches!! :lol::lol:

I'm running 93 as stated before. But by the end of next week I'll be running 93+ 80/20 meth mix.

sunoco 93, or gulf 93

sunoco ultra 93

sunoco ultra 93

*cough BP is better* *cough cough*

:P

but because you drive a saturn sunoco is alright. :)

i run 89 in my 2.2

93 from name brand stations...

*cough BP is better* *cough cough*

:P

but because you drive a saturn sunoco is alright. :)

we done have BP around here lol
but in NJ i fill up with BP before and after the track lol

is 91 good enough for the T/C??

93 0r 94

we done have BP around here lol
but in NJ i fill up with BP before and after the track lol

:twothumbs

this guy knows his gases. :guns:

93 burns as clean as any other octane.

If you are getting more soot with 93 that just means the pcm is adding more fuel, which is making more power, which is kind of the whole point of the tc, no?

You may not be able to hear it but your motor will be knocking on 87. Sustained knock has all kinds of wonderful effects including holed pistons and shattered ring lands, bad shit if you ask me.

If you really want to run 87 get a 2.2, they love that stuff.

You better listen to this guy or your an idiot. Some 93 octane isn't even really 93 octane did you know that people??? If you get premium at Arco to be a cheap ass because premium is fifty cents cheaper than 87 at a normal gas station then your an idiot. I had a friend have to put Arco in his tank and he was extremely pissed off because it was Arco but thought since it was premium it would be okay. He has the same cobalt SS/SC with mods and the second he put ten bucks worth of ARCO in his tank and started the car you could hear a HORRIBLE knock even though it still said 93 octane. I know of this specialty gas station thats pretty far away from me that actually sells credable 95 octane and it is the best stuff by far you could ever put in your tank. If you drive an SS and use less than 93 octane your really not very smart at all being a cheap ass like that. Sure your car isn't a Ferrari but the concept is the same if it needs high octane it needs high octane or your gonna ruine your car.

i use 93

X2 i use 93

someone please answer my question, is 91 octane okay to put in a T/C?

:twothumbs

this guy knows his gases. :guns:

BP or sunoco are really all i fill up with lol they come from US and theyre both pretty good gas

someone please answer my question, is 91 octane okay to put in a T/C?

yes, it's fine, but if you have the opportunity to use 93 then do so.

BP or sunoco are really all i fill up with lol they come from US and theyre both pretty good gas

they come from US? BP = british petroleum. They get their crude oil from the middle east, then refine it in LA... Sunoco gets most of their oil from venezuela, none from the middle east.

yes, it's fine, but if you have the opportunity to use 93 then do so.



they come from US? BP = british petroleum. They get their crude oil from the middle east, then refine it in LA... Sunoco gets most of their oil from venezuela, none from the middle east.

my bad ... i thought they were beyond petroluem and they got their oil from the us


i'd heard that it came from US oh well lol my bad lol but it looks like it's from mid east and i guess more what i meant is didn't come from middle east lol worded wrong however looks like i was wrong about that oo

my bad ... i thought they were beyond petroluem and they got their oil from the us

" British Petroleum, which traces its origin to 1901, was already known informally as BP when it made its most notable entry into the North American oil business as a pioneer explorer in Alaska during the late 1950s. "

i'd heard that it came from US oh well lol my bad lol

no big deal, just correcting info. BP is a somewhat sketchy company. I've read a lot of strange things about stuff that has gone on within that business. I usually just get my gas from wherever is close. Everywhere around her has at least 93 and there is a, I think speedway, but i'm not sure on woodward that has 100 unleaded.

no big deal, just correcting info. BP is a somewhat sketchy company. I've read a lot of strange things about stuff that has gone on within that business. I usually just get my gas from wherever is close. Everywhere around her has at least 93 and there is a, I think speedway, but i'm not sure on woodward that has 100 unleaded.

yea no place has above 93 around me lol .. which would be nice to get some 97 lol tweak my tune out a bit but i guess thats what a dual map tune lol

93 here

c16.

sigh, stupid clovis town that i live only has 91.

i use 93 every where i go

someone please answer my question, is 91 octane okay to put in a T/C?

Yes and No. Not okay in my book. If you do any mods definately not okay in my book. I have a SS/SC with stage 2 and it says right in the GM catalog that the stage kits require 93 or above. If your TC is stock then read the manual and see what it says. If your not stock I can guarantee you need to be running 93. Especially if you get the new GM stage kit for your car. GUARANTEED!

sigh, stupid clovis town that i live only has 91.

Clovis New Mexico huh...... I have a Clovis indian arrowhead from there. These are the worlds oldest artifacts traced back to the first people we know of. I got lucky and inheireted it from my Grandpa. I want to sell it cause I know a museum will pay me a fortune but I told Grandpa I wouldn't. Oh well I have the oldest thing you can find from the first humans in perfect condition. I feel blessed.

Good ol' 87 for me.

I don't get the people with SS/TC asking about using 87. You paid all that money for great performance, why try to put it out with 87?

Good ol' 87 for me.

I don't get the people with SS/TC asking about using 87. You paid all that money for great performance, why try to put it out with 87?

Cause there idiots dude and when it breaks and they take it to the mechanic and find out it was from using the wrong fuel they'll find out why you should not be a cheap ass when it comes to gas in your high performance vehicle.

i use 93

http://www.cobaltss.net/forums/showthread.php?t=178986

I put 93 in mine.

93 is the only way to go respect your balt:cool:

I have the LSJ but with no stage upgrades. I use 87 octane.

one fucking million

i have an 06 ss/sc and 92 octane. do you guys think thats good enough? and if i go up to 93 would i get better gas mileage?

I use 87 in my SS/TC. Seems to be working fine so far. I still beat up on Rustang GT's all the time.



I've been thinking about going to E85 soon though, for better fuel economy and performance. I just need to flush out the old petrol, right? Maybe check the fuel pressure a little more often?

I use 87 in my SS/TC. Seems to be working fine so far. I still beat up on Rustang GT's all the time.



I've been thinking about going to E85 soon though, for better fuel economy and performance. I just need to flush out the old petrol, right? Maybe check the fuel pressure a little more often?

ur car must run like absolute shit :lol:.......oh and i just jet fuel btw......... :lol:

i use root beer!!

ur car must run like absolute shit :lol:.......oh and i just jet fuel btw......... :lol:

It's probably faster than your shit. And gets better gas mileage.

i use 87 in my ss/tc. Seems to be working fine so far. I still beat up on rustang gt's all the time.



I've been thinking about going to e85 soon though, for better fuel economy and performance. I just need to flush out the old petrol, right? Maybe check the fuel pressure a little more often?



lmfao. You're definitely faster than my 2.4 for the moment, but don't expect that to last long if you just toss e85 in there. I'm curious as to why people buy $20,000 cars and then jew out on the gas that the owner's manual reccommends.

I use 87 in my SS/TC. Seems to be working fine so far. I still beat up on Rustang GT's all the time.



I've been thinking about going to E85 soon though, for better fuel economy and performance. I just need to flush out the old petrol, right? Maybe check the fuel pressure a little more often?

you ues 87 and it runs fine?? my friend tried to run 87, (it was a mistake) in his hhr ss and it ran like shit we had to drain his tank. i guess good luck:)

It shouldn't knock to the point that you have to drain the tank if you're stock. Retard above says it runs fine in his TC, or maybe he doesn't know what knock sounds like. I wish with all of my heart that his car blows up.

I wish with all of my heart that his car blows up.

Well that's not very nice..

It shouldn't knock to the point that you have to drain the tank if you're stock. Retard above says it runs fine in his TC, or maybe he doesn't know what knock sounds like. I wish with all of my heart that his car blows up.

its didnt knock its didnt run right. it missed and cut out and is no fun to drive lol

Well if he's stock then there's something wrong here. Because 87 should not fuck up a stock Ecotec of any variety to the point that it's undriveable.

yeah, 87 Octane in a TURBO? U kno how much heat is generated in that thing? u must be detonating like crazy! turn ur radio down and ull hear ur engine killing itself. I tried 2 be a cheap ass and run 87 on my stage2 and I heard the knock under the hood. i IMMEDIATELY filled it with 91&8lil carbon molecules. It took 2 tanks b4 it went away completely. i dont have access to 93octane tho, not that im aware of anyway. I used 2 stay close 2 a place selling 100octane @ 6.99/gal, prob 8 dollars by now. Car ran AWESOME with it! I still remember the sound of the supercharger and me n my homies face like "oh shit, TAKE OFF!" And my personal advice always use the same type/brand of gas. Strictly CHEVRON 4me, kills me when I see sumbody pumpin ARCO trash into their fine tuned machine-ITS NOT THE FAMILY FORD AEROSTAR, KIDS!

It's probably faster than your shit. And gets better gas mileage.

LOL oh no pplz we have another hot-head cocky TC owner :lol: everybody watch out for general space monkey over here and ya im sure u get better mileage considering ur burning more fuel to compensate ...its in ur manual that came with the car theres a reason it says (recommended) in it instead of just use w/e the fuck you want in it. 87 should be if u have absolutely no choice and have to get to the next gas station or something /discussion

ITS NOT THE FAMILY FORD AEROSTAR, KIDS!

No, it's a Chevy Cobalt. 100 is overkill for stage 2, 93 would be fine.

1 thing im still not clear about, octane boosters r supossed 2 raise 87octane, do they raise 91octane? Ive heard so much debate Ive even 4got what i knew by heart. Work with me here, confined 2 California gas, TIGHTEST EMMISIONS ASSHOLE in the country...

No, it's a Chevy Cobalt. 100 is overkill for stage 2, 93 would be fine.

you are right. you will not see a boost in power unless you are tuned for 100 octane.

In colorado I can only buy 91 octaine premium, so that is what I run.

In colorado I can only buy 91 octaine premium, so that is what I run.

At your altitude, that should be plenty good.

Higher altitudes require lower octane ratings due to the lower air density.

You also won't make as much power at altitude (unless you tweak the boost up) - my 2.4 is draggin it's ass over the Highwood Pass (2206m, 7239 feet) compared to the home elevation (3400 feet):lol:

yeah, I used to have a base cobalt and I hated it in the mountians of colorado. I never took the 2.2 up to the top of Mt. Evans. I just took the SS to the top of Mt. Evans, the highest paved road in the continental US 14,000 ft! with no problems! I can't wait till I drive the SS to sea level next summer and see how the car performs at sea level.

I have the LSJ but with no stage upgrades. I use 87 octane.

stop using 87. your getting worse gas mileage and less performance.

It's probably faster than your shit. And gets better gas mileage.

ummm... no. you will get worse gas mileage by using lower octane. Stop being a cheap ass and use premium. I can't believe how many people, especially on car forums don't use the correct gas in their car. what's the point?

Simple as this .... if you can't afford premium gas, you shouldn't have bought a car that requires it !!!! Also, don't give me that it can run on 87 crap. 87 octane kills the performance and gas mileage of the SS model Cobalts (SS/NA, SS/SC, SS/TC).

93 FTMFW!!!!!!!!!!:twothumbs:

Use what the manual recommends (note for the SS/SC/TC models it says 91 or above but use common sense, race fuel isn't a necessity :)); jesus christ why is this so hard for people to comprehend :lol:

91 as because its the highest i can find in new mexico

91 for me too:thumbsdow N.S. doesn't sell anything higher that I know of. And here is only like $0.10 more a litre, so I don't complain.

I run 87 sometimes, Premium other times. Depends on my mood.

I can tell you this. We used to have 91 as Premium around here, and just got 93. It does run better. Cooler as well.

93 only

I used 2 go 2 VPRacing for 100octane sometimes but they're saying its pointless. where can i find 93 octane in the L.A. area?

i just use the 92/93 octane that's at the gas stations around me. anything more is pointless since the car is stock and tuned for this octane

cnex 96

91 :( High Altitude though

Nothing short of full 110 octane race gas in my stock 2.4 at all times. The higher the octane, the better chance I have of getting to 1 million miles. :twothumbs

i just put 89 in my car for the first time

93 until they have something higher at the pumps

lol it's literally a block from my house, i guess i gotta step it up a notch:red:

mohawk uses more ethanol then the other stations here, worse fual mileage

Nothing short of full 110 octane race gas in my stock 2.4 at all times. The higher the octane, the better chance I have of getting to 1 million miles. :twothumbs

i know youre kidding.. but ... srsly someone will believe you

e85 octane:p haha

i use 91-93 when I can afford it. And most time if i don't have the cash to fill it up I will run the 89 but majority of the time I only run it for a day or two until i get paid.