No more Sunoco Ultra 94 ????
Race Director
Joined: Apr 2000
Posts: 11,073
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From: South Joisey
Originally Posted by dpd
as of last week,94 was taken out here in nj.i always used 94,now ?????
And an added benefit may be less carbon in your combustion chamber.I never could understand why people would pay an extra 10 cents a gallon for 1 additional octane point they didn't need. To me it's a self-inflicted Corvette tax.
Oh yeah, I forgot, Corvette neurosis.
Thread Starter
Racer
Joined: Jan 2005
Posts: 457
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From: Mechanicsburg Pa
It takes more oil to make (refine) high octane gasoline. With crude oil prices as high as they are, could this be a trend to decrease octane while charging around the same price as the higher octane it replaced?
Last edited by C5Jim; Feb 21, 2006 at 06:29 PM.
Le Mans Master
Joined: Sep 2002
Posts: 8,991
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From: Hanger 18 Taxachusetts
Originally Posted by C5Jim
I filled up my car yesterday at Sunoco and found that Ultra 94 is now Ultra 93. 
Not only that, but they now have 2 mid grades, 89 and 91.
Is this happening just in Pa?
Not only that, but they now have 2 mid grades, 89 and 91.
Is this happening just in Pa?
The car is designed to run on 91 isn't it, anything more is just a waist of money
Burning Brakes
Joined: Jan 2003
Posts: 833
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From: Midtown Motors Indiana
Cruise-In V Veteran
Cruise-In VI Veteran
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If they do away with my 94 I'm going to protest, you know sighs, banners set on there door step for days.
My Vette needs 94
My Vette needs 94
Pro
Joined: Jan 2006
Posts: 606
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From: Wernersville PA
I honestly think anyone would be hard pressed to feel the difference between 93 and 94. Higher octane is only beneficial for reducing detonation. Unless you are running a high compression engine, 93 is fine.
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Drifting
Joined: Sep 2005
Posts: 1,788
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From: Tallahassee FL
Has anyone actually tested the different brands of gasoline? Back in my GTO days (early 70s) I did some informal testing of all the highest octane versions of every brand in my area. Shell and Exxon had good mileage but so-so performance. Amoco (I think that is what it was called back then) had good performance but lousy mileage. The only one that had good mileage and great pep was Sunoco 260. I may have tested other ones by I don't remember now.....
Unfortunately, Sunoco is kind of rate here in north Florida. But I tend to use the premium name gasolines at 93 octane and avoid the no-name brands.
Unfortunately, Sunoco is kind of rate here in north Florida. But I tend to use the premium name gasolines at 93 octane and avoid the no-name brands.
Melting Slicks
Joined: Mar 2003
Posts: 3,116
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From: Macomb MI
Originally Posted by DoubleZ06
I honestly think anyone would be hard pressed to feel the difference between 93 and 94. Higher octane is only beneficial for reducing detonation. Unless you are running a high compression engine, 93 is fine.
. Not only from the extra point, but the additivesin the fuel that gets them the extra point and how it respondes in an FI motor.Phil
Melting Slicks
Joined: Mar 2003
Posts: 3,116
Likes: 10
From: Macomb MI
Originally Posted by C5 Curmudgeon
Actually, it's probably better off without it.
Phil
Le Mans Master
Joined: Sep 2002
Posts: 8,991
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From: Hanger 18 Taxachusetts
Originally Posted by DoubleZ06
I honestly think anyone would be hard pressed to feel the difference between 93 and 94. Higher octane is only beneficial for reducing detonation. Unless you are running a high compression engine, 93 is fine.
The everyday Joe wont notice a thing and I bet your car wont either.
Race Director
Joined: Apr 2000
Posts: 11,073
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From: South Joisey
Originally Posted by RoadRebel
Get a clue, this is the Tech section, not the General section. A Significant amount of cars in this section have been tuned and optimized on sunoco 94. And, as people are finding out the 93 is not cutting it based on knock sensor response.
Phil
Phil
So, perhaps, you're the one who needs to get a clue.
Thread Starter
Racer
Joined: Jan 2005
Posts: 457
Likes: 0
From: Mechanicsburg Pa
In regards to high octane, the argument can go both ways. But if you take your car out on the track as I do, then octane counts. Engine coolant temps and oil temps rise, as that happens combustion chamber pressure increases, then knocking occurs. I would think at that point you'd wish you had an extra octane point.
For those non-believers, have you ever driven a car that has overheated in the summer or lost a fan belt, etc. As the engine got hotter, the knocking increased.
Loss of octane at the pump, whether it's needed or not, is not a good sign. Let's hope this is not a trend.
For those non-believers, have you ever driven a car that has overheated in the summer or lost a fan belt, etc. As the engine got hotter, the knocking increased.
Loss of octane at the pump, whether it's needed or not, is not a good sign. Let's hope this is not a trend.
Le Mans Master
Joined: Aug 2000
Posts: 5,294
Likes: 2
From: Suffolk, Long Island NY
Originally Posted by RoadRebel
Get a clue, this is the Tech section, not the General section. A Significant amount of cars in this section have been tuned and optimized on sunoco 94. And, as people are finding out the 93 is not cutting it based on knock sensor response.
Phil
Phil
This isn't the waxer section.
Having access to 94 for the street was nice. As for the track, I add a few gallons of 100 and have noticed a MPH increase and E.T. decrease.
Team Owner
Joined: Jul 2003
Posts: 20,474
Likes: 2
From: Detroit
Originally Posted by C5 Curmudgeon
And for the other 98% of us, my statement is correct.
If 94 is dead I'll probably just run 93 + Torco or just straight 100.
Cheers,
Mark
Drifting
Joined: Sep 2000
Posts: 1,593
Likes: 426
From: Fulshear TX
Octane requirements
Originally Posted by mkiv808
From what I've heard, 94 is useless unless you're running higher-than-stock compression. Or FI.
Race Director
Joined: Jul 2005
Posts: 11,308
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From: The Beautiful Greater Bay Area California
Originally Posted by Z.06
Not true. I have a stock 2001 Z06 (OK, it has a Vortex inlet filter box) and it runs fine on 93 octane premium. But drive it on 91 octane premium in West Texas, New Mexico, Arizona, California (crap gas), Nevada, Utah, and Colorado and it pings like crazy. Two dealers have checked it out and it has been decarboned twice. The engine computer has been reflashed twice and the pinging on 91 octane has not diminished. She runs great on 93 octane, though.
I have to agree with you on the Crappy gas in Cali. It is just 91 octane ("Ping-tane") in these parts. 
Safety Car
Joined: Dec 2005
Posts: 4,184
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From: CT
Originally Posted by Z.06
Not true. I have a stock 2001 Z06 (OK, it has a Vortex inlet filter box) and it runs fine on 93 octane premium. But drive it on 91 octane premium in West Texas, New Mexico, Arizona, California (crap gas), Nevada, Utah, and Colorado and it pings like crazy. Two dealers have checked it out and it has been decarboned twice. The engine computer has been reflashed twice and the pinging on 91 octane has not diminished. She runs great on 93 octane, though.