98 octane fuel
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Joined: Oct 2011
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From: Paragould Arkansas
98 octane fuel
I have a 2015 Stingray. I am new to Corvettes. There is a gas station that I can go to that has ethanol free 98 octane pump fuel. Is that safe for my car and would it make a difference utilizing the stock tune?
Team Owner
Joined: Sep 1999
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From: Springfield MO
93 is the highest you need and 93 is better performing than 91 in the C7.
You are lucky in that 93 is what most stations in Arkansas sell as their premium grade.
Check out the North Point Valero station on Hwy US49 north side of town. They sell ethanol free 93 octane gas. That's the best of all worlds. 93 octane premium, Top Tier retailer, and no stinkin' alcohol to weaken it.
You are lucky in that 93 is what most stations in Arkansas sell as their premium grade.
Check out the North Point Valero station on Hwy US49 north side of town. They sell ethanol free 93 octane gas. That's the best of all worlds. 93 octane premium, Top Tier retailer, and no stinkin' alcohol to weaken it.
Last edited by JoesC5; Nov 12, 2015 at 07:27 PM.
Safety Car
Joined: Jan 2015
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From: Northern Virginia
Won't hurt anything. The fact that it's ethanol free will probably improve gas mileage a bit (1-3mpg) compared to 10% ethanol. But I suspect that fuel is expensive enough that you'd still spend a lot more per mile than you will with 93 octane 10% ethanol.
Drifting
Joined: Jan 2005
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From: Houston Tx
I suspect it’s probably a misleading claim, and is probably the “R” octane as is posted in most of the world other than the US. The US normally posts (R+M)/2. The “M” octane is usually about 10 lower than the “R” octane, so if the 98 really is the R number, it’s pretty close to the usual premium 93 (R+M)/2. It would be nearly impossible to blend 98 (R+M)/2 without ethanol, lead, MMT, or some other octane improver. Only one refinery gasoline component is that high (reformate), and its boiling range is too heavy to use without some lighter components in the blend. But no lighter components (other than ethanol which it supposedly doesn’t have) are that high in octane. So basically, something about the claim is off. For what it’s worth, R and M octane measurements are simply two different ways of setting up conditions in the octane test engine. One varies spark advance and one varies compression ratio, I forget which is which.
As others have said, with a stock tune, 98 wouldn’t do you any good anyway, and if it’s some sort of screwy blend (with lead, MMT, or no light components) it would have potential to do you harm. So I’d be inclined to stay away from it.
As others have said, with a stock tune, 98 wouldn’t do you any good anyway, and if it’s some sort of screwy blend (with lead, MMT, or no light components) it would have potential to do you harm. So I’d be inclined to stay away from it.
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Thread Starter
Navigator
Joined: Oct 2011
Posts: 9
Likes: 0
From: Paragould Arkansas
93 is the highest you need and 93 is better performing than 91 in the C7.
You are lucky in that 93 is what most stations in Arkansas sell as their premium grade.
Check out the North Point Valero station on Hwy US49 north side of town. They sell ethanol free 93 octane gas. That's the best of all worlds. 93 octane premium, Top Tier retailer, and no stinkin' alcohol to weaken it.
You are lucky in that 93 is what most stations in Arkansas sell as their premium grade.
Check out the North Point Valero station on Hwy US49 north side of town. They sell ethanol free 93 octane gas. That's the best of all worlds. 93 octane premium, Top Tier retailer, and no stinkin' alcohol to weaken it.
Thread Starter
Navigator
Joined: Oct 2011
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From: Paragould Arkansas
Burning Brakes
Joined: Jun 2013
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Which explains why a leaded fuel pump nozzle can not be used to get fuel into a modern car's fuel tank but I believe there are cars traveling the US highways that use leaded fuel. Granted these vehicles were assembled before 1974, but nevertheless if they are going to traverse the roads on their own power they need leaded fuel.
Laborsmith
Laborsmith
Drifting
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From: Houston Tx
The station is in Fayetteville, AR. www.hioctanefuel.com
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St. Jude Donor '12 thru '17
Which explains why a leaded fuel pump nozzle can not be used to get fuel into a modern car's fuel tank but I believe there are cars traveling the US highways that use leaded fuel. Granted these vehicles were assembled before 1974, but nevertheless if they are going to traverse the roads on their own power they need leaded fuel.
Laborsmith
Laborsmith
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Joined: Feb 2000
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From: Arizona
93 is the highest you need and 93 is better performing than 91 in the C7.
You are lucky in that 93 is what most stations in Arkansas sell as their premium grade.
Check out the North Point Valero station on Hwy US49 north side of town. They sell ethanol free 93 octane gas. That's the best of all worlds. 93 octane premium, Top Tier retailer, and no stinkin' alcohol to weaken it.
You are lucky in that 93 is what most stations in Arkansas sell as their premium grade.
Check out the North Point Valero station on Hwy US49 north side of town. They sell ethanol free 93 octane gas. That's the best of all worlds. 93 octane premium, Top Tier retailer, and no stinkin' alcohol to weaken it.
Burning Brakes
Joined: Jun 2013
Posts: 894
Likes: 5
Nope. Leaded fuel in vehicles - any vehicles - has been illegal for many years here and most other countries. You can still buy leaded avgas but putting it in a car is illegal. There are ways, such as installing hardened valve seats, to make old engines work with unleaded gas.
Laborsmith
E-Ray, 3LZ, ZER, LIFT
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From: NE South Carolina
Had a tech who worked in Florida where they had several high octane gas pumps up to racing fuel level! They are typically used by folks with ~2 liter high performance engines that they boost the heck out of!! Now if you have a Z06 and increase the boost pressure would be useful! Otherwise no need. Depending on where you live 91 or 93 octane is all than is needed. 93 around hear in Eastern SC.
Last edited by JerryU; Nov 13, 2015 at 03:52 PM.
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From: Witness Protection Program Somewhere, USA
2026 Restomod of the Year Finalist
Maybe it's all in my head but when I mix about 4-5 gallons of 101 octane with 91 octane, the car seems to react very positively performance wise.
Oops forgot to mention I have the Z06.
Oops forgot to mention I have the Z06.
Last edited by SLWRNU; Nov 13, 2015 at 11:53 AM.
Team Owner
Joined: Sep 1999
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From: Springfield MO
That's on the top end of what is recommended for your car(93 in usually the highest premium available in most locations). Not surprising that you can feel a performance improvement, especially since you are blown.
We had a a couple of stations here in town that was selling 94 octane ethanol free premium, but they changed to 93 octane. I could not feel any difference in performance between the 94 and the 93 octane after the change. All, but maybe around 9-10 stations, here in town only sell 91 octane premium, with those 9-10 stations selling 93 octane. I can definitely feel the difference in performance with my NA Z06 between 91 and 93 octane, but I can't feel the difference in performance between 91 and 93 octane in my blown Mercedes.
Last edited by JoesC5; Nov 13, 2015 at 01:35 PM.
Heel & Toe
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From: Dallas TX
Remove your plate completely no?