I've been using 87 and am quite happy. Since it doesnt require premium I see no need in using it. From everything I learned in school, higher octanes are only needed for high compression ratio engines (tuned V's may require premium).

I'm just curious to see how other people fuel theirs

hmm premium.
The higher the octane the better.

I have tried 87, 89, 91, 92, 93, 94 ocatne fuel in my car and noticed no difference in performance. I just came out of a 03 mustang GT and I really noticed the difference between 87 and 94 in it (I had a tune though)

92 or 93 premium

ive never put anything below 93

93 octane - mobil :bouncy:

Shell V Power baby!!!!

93 octane Chevron with Techron :)

You are right 87 is fine for our cars.

I used to always use Sunoco 94 but they stopped making it. I now use Sunoco 93, the highest octane they got.

I've been using 87 and am quite happy. Since it doesnt require premium I see no need in using it. From everything I learned in school, higher octanes are only needed for high compression ratio engines (tuned V's may require premium).

I'm just curious to see how other people fuel theirs

The LS6/LS2 are high-compression motors, so I suppose I'm confused...

In any case, I only put the best gas I can get out here in CA (lame 91 octane), as my car is blown and needs every ounce of octane it can get.

Even if my car wasn't blown, however, I'd STILL put premium gas in my car, as detonation is bad for a high compression/high performance motor. I suppose it's more of a safety thing in my mind.

The Maggie requires premium for optimal performance, which is only 91 octane here in CA; even then, had some pinging/pre-ignition problems on initial install, corrected after some adjustments by StealthV and his tune. Shell V-power seems to work best (perhaps it's the name!).

they still make 94....sunoco ultra...in pa they do anyway...:highfive:

I use the highest octane rated gas I can get in my LS1 & LS6. When I'm on trips and can get 93 I buy it. Because of the Predator in my LS1 I can't use anything less than 91. The LS6 is tuned to pull out timing in certain cells to get rid of predetonation, which you can't always hear.

:thumbsup:

I use the very cheapest gas I can find--always 87 octane. My car was tuned on a chassis dyno at DTE to run on 87 octane--plus I've got water methanol injection that kicks in to boost the octane under load, cool the intake charge, and steam clean the combustion chambers.


Jack

I use the very cheapest gas I can find--always 87 octane. My car was tuned on a chassis dyno at DTE to run on 87 octane--plus I've got water methanol injection that kicks in to boost the octane under load, cool the intake charge, and steam clean the combustion chambers.


JackYeah, but that's cause you're weird.:thepan:

Sunoco 93 or 94 - depends on my mood, the V doesn't care

Here's some good reading on the topic...

http://www.cadillacfaq.com/faq/answers/gas/index.html

I put 91 (crap CA gas) but its also about brand and station...

Reed

they still make 94....sunoco ultra...in pa they do anyway...:highfive:

Yeah, Sunoco Ultra 94 is definitely still around..........in select areas. I find in in NJ too.

But here in CT, anything 93.......not picky on the brand.

Yeah, Sunoco Ultra 94 is definitely still around..........in select areas. I find in in NJ too.

But here in CT, anything 93.......not picky on the brand.

Its still in NJ, I get it whenever I'm there, just to get it since its not around here.

Anything less than 91 Octane and youre into the low octane table in the PCM, meaning youre doing yourself no favors. Youre reducing your power significantly. Sure youre V will "run fine" on 87 but youre not into the high octane map (table) which gives you optimum performance parameters (Just ask StealthV!). Spend the extra 3 bux for the good stuff and do yourself a favor.

F

i have a lease and still put 91 in cali

Anything less than 91 Octane and youre into the low octane table in the PCM, meaning youre doing yourself no favors. Youre reducing your power significantly. Sure youre V will "run fine" on 87 but youre not into the high octane map (table) which gives you optimum performance parameters (Just ask StealthV!). Spend the extra 3 bux for the good stuff and do yourself a favor.

F:yeah:

You may not notice the reduction in performance when using lower octane unless you're pushing your car. It'll run fine on 87 under the roadload requirements of normal commuting because the V has so much excess power. I run 93 religiously ... just in case. :thumbsup:

You will probally also see a small reduction in gas milage running 87

I did try using a middle octane for a few tankfuls, but I found a degradation in performance. I was getting shut down by Hondas and shot down by beautiful women in red dresses. Okay, maybe I imagined some of that. So, I have decided to stick with premium.
Also important to me is this:
http://www.toptiergas.com/
In my area, Washington DC, that usually means Shell. If I can't find a Shell, I usually just park the car and go for a walk. Most of those others don't even exist around here. MFA sounds vaguely obscene. Wonder what that stands for?

they still make 94....sunoco ultra...in pa they do anyway...:highfive:

Funny Sbones, because down here near Philly, all the stations don't carry it anymore. I just assumed they stopped making it alltogether.

Maybe it has something to do with the emissions thing down here.

93 Shell for me. I'm with Florian on this one. 15 gallons of premium is about $1.50 more than mid-grade and $3.00 more than 87. I'll splurge on her and just take the wife to McDonalds instead of the steak house.

I use water....

Here in Texas high octane is 93 and that's what I fuel the V with. I have been alternating the fuel companies approx every 5000 miles so that each companies cleaning additive, which are all different, will work to clean the small amount of deposits left by the previous brand. That's been alternated between Citgo, Chevron, and just recently switched to Shell. For the price difference between 87 and 93 I simply have to say no to one trip to a Starbucks or an energy drink and it's easily covered.

92 is the highest octane in WA state, therefore that is what I use, anything less would be uncivilized

Shell V Power baby!!!!
Yeah... like I thought Shell V-power was a requirement. It's too cool when the gas matches your car. :bonkers:

Premium only. Octane rating of gas is the amount of compression the gas can handle before it self ignites; i.e. the lower the number the higher the potential for "knocking". There's only about a dozens engines in the world that require "high octane" gas and the Corvette engine(s) is one of them.

Premium only. Octane rating of gas is the amount of compression the gas can handle before it self ignites; i.e. the lower the number the higher the potential for "knocking". There's only about a dozens engines in the world that require "high octane" gas and the Corvette engine(s) is one of them.


My manual says recommends, not requires. Usually when it requires it, they put warnings around the car (instrument cluster, gas cap cover). Never had a knock, but I have crushed a few dreams.

My manual says recommends, not requires. Usually when it requires it, they put warnings around the car (instrument cluster, gas cap cover). Never had a knock, but I have crushed a few dreams.

You read the manual? :bigroll:

I could have sworn my 01 Z06 had a "premium only" label on the gas cap cover.

You read the manual? :bigroll:

I could have sworn my 01 Z06 had a "premium only" label on the gas cap cover.

Thats interesting since its the same engine... better control of timing on CTS-V to allow 87?

My manual says this on Gasoline Octane (skipping to 5.7L section):

5.7L V8 engine use premium unleaded with a posted octane of 91 or higher for best performance. You may also use middle grade or regular unleaded gasoline rated at 87 octane or higher, but your vehicles acceleration may be slightly reduced. If the octane is less than 87, you may get a heavy knocking noise when you drive. If this occurs, us a gasoline rated at 87 oactane or higher as soon as possible. Otherwise you might damage your engine

I tried mid-grade early on with the V and when I really got in to it the knock would be bad, staying with 91 or better and when you bang it, it bangs without any extra noise, just the air sucking into the K&N and the wonderful melody coming out the B&B's.

livingthedream
turn the key and smile

If you put the difference in cost on a spreadsheet you will see the difference may be minimal for Premium. It won't hurt the motor to use it for sure.

BTW. Sunoco stations in the Detroit area still sell 100 octane (or is it 102?) 5.45/gal if you want the thrill and money is no object.

Back to Sunoco, I'm in North Jersey and the two stations I go to are now 93; I wondered what the hell happened and tried to check on Sunoco's website without resolve. I'm guessing it's select stations with owners who are thinking with the way gas prices are the cheaper the gas reguardless of grade, the more volume they'll do. It just sucks!!

Back to Sunoco, I'm in North Jersey and the two stations I go to are now 93; I wondered what the hell happened and tried to check on Sunoco's website without resolve. I'm guessing it's select stations with owners who are thinking with the way gas prices are the cheaper the gas reguardless of grade, the more volume they'll do. It just sucks!! Since New Jersey is a socialist state that won't allow you to pump your own gas, I'm surprised they sell anything but 87 octane. That's all the proletariat should need!

It's funny you say that because are wonderful governor who recently shut down the state for a week over some budget bullshit wants to make us pump our own gas in the near future......... F- that!!!! I don't like to get out of my car in the winter or rain!!!! hahahah NJ people please back me up here!!!!!!!!:highfive:

Since New Jersey is a socialist state that won't allow you to pump your own gas, I'm surprised they sell anything but 87 octane. That's all the proletariat should need!

By the way, I don't think any gas station attendant is going to tackle you down if he spots you pumpin' your own gas. So, if pumpin' your own gas is indeed your kind a thing, by all means, enjoy! Me? Well, I'm going to keep my lazy ass seated in my car. :thumbsup:

Ummmmmmmmmm.....if a 10 to 1 motor isnt a high compression motor...what is?

Yeah the comp will adjust for crap gas...just like your wife can pretend you are taking care of her.

But honestly...why not give them both what they need...a good shot of premium.

Ummmmmmmmmm.....if a 10 to 1 motor isnt a high compression motor...what is?

Yeah the comp will adjust for crap gas...just like your wife can pretend you are taking care of her.

But honestly...why not give them both what they need...a good shot of premium.


heheheh, I like the analogy...

I'm buring through my 87 oct. tank now and gonna put in some 91 for my trip down to NC this weekend. I see no need in ultra high performance on the way to work and back during the week, so 91 is a waste. However, for track driving and highway driving, I wouldnt mind giving the 91 a whirl.

I looked at some c5z06 forums about this same issue and they made a good point, which may have been made earlier in this thread, but I'm too lazy to look. 91 is as high as you need. Youre above the limit where it needs to retard the spark (I'm guessing it does this), so any additional octane doesnt help. I studied combustion for a year and did my grad research on jet engines with no moving parts, so I know a little bit about these things, but most of the time I experimented with ethanol (yummy!!) as well as propane and hydrogen (not so yummy).

By the way, I don't think any gas station attendant is going to tackle you down if he spots you pumpin' your own gas. So, if pumpin' your own gas is indeed your kind a thing, by all means, enjoy! Me? Well, I'm going to keep my lazy ass seated in my car. :thumbsup:Good luck trying! You will NOT be able to pump your own gas. I have to "prepay" the attendant to use my patented move. The upside-down flip triple tap. Virtually guaranteed to not drip down the side of your car.

And if I'm using a faulty nozzle, the car gets washed immediately. Especially the V.

91 is as high as you need. Youre above the limit where it needs to retard the spark (I'm guessing it does this), so any additional octane doesnt help.

Around here most stations run 87,89, and 93.

Although when I run through Oklahoma, their HiOct is 91. Sad/good thing is their 91 is about .30c cheaper per gallon than the 93 here. (Dallas) :rant2:

If you can't afford Premium gas then you shouldn't own a V. Deposits could be an issue when running 'cheap' gas. Keep that in mind too.

Good luck trying! You will NOT be able to pump your own gas. I have to "prepay" the attendant to use my patented move. The upside-down flip triple tap. Virtually guaranteed to not drip down the side of your car.

And if I'm using a faulty nozzle, the car gets washed immediately. Especially the V.

Just this past week, as i was getting my car filled up, I saw someone next to me filling their own vehicle. I think I see this happen at least once a month - and that's most likely a factor of the frequency at which I run into people that actually choose to do this, not so much the frequency at which I run into a gas station attendant that allows this.

Aren't you up in CT, anyway?

Just this past week, as i was getting my car filled up, I saw someone next to me filling their own vehicle. I think I see this happen at least once a month - and that's most likely a factor of the frequency at which I run into people that actually choose to do this, not so much the frequency at which I run into a gas station attendant that allows this.

Aren't you up in CT, anyway?Being that it's a state law, one should not be able to pump their own gas. This isn't a job issue, supposedly it's a safety issue. Believe me, if I knew I was allowed to pump my own gas, I would. What you're seeing is either a mistake or a wink wink nod nod arrangement.

And I'm in Massachusetts. It's amazing that I can manage to make it out off this guarded island and finagle my way the thousands and thousands of miles, fighting off pirates and gargoyles to find my way to New Jersey, huh?

Down here full service stations are very rare. 95%+ of people pump their own gas. The safety issue isn't usually the gas pumper, it's the drunk or criminal running into the pumps and causing problems.

Not saying that it's totally ludicrous and out of the question that some fella or gal from Connecticut or, in your case, Massachusetts would dare cross a couple of state borders to mosey on over into the Garden State.

I was just wondering if you wandered into NJ enough that you might have had previous experiences that led you to believe it was an impossibility for one to pump his or her own gas.

Yes, it is a state law - I know. Jay walking is also against law, isn't it? You should not jay walk, right? Can you? I mean, c'mon.

Anyway, I'm just trying to say that it's not something so egregious to the degree that it is some kind of "mistake or a wink wink nod nod arrangement". They simply just don't care. It's really not a big deal. Like I said, no gas station attendant, or anyone else for that matter, is going to come and tackle you for pumping your own gas.

And just to make it clear, I wasn't trying to call you out, saying that you aren't from NJ. And I'm not trying to get into a pissing contest. Just wanted to clarify. Toodles.

Trouble is, when you pump your own in NJ you still pay the pump it for you price!

For the most part if the attendant sees youhave an expensive car or an antique or something it's basically the go-ahead for you to do it yourself if you want because they don't want to be responsible. If you have an average car, they just don't give an F-