I use sunoco 93 all the time, my car runs perfect.
Problems with Sunoco fuels??
Thread Starter
Le Mans Master
Joined: Sep 2003
Posts: 6,386
Likes: 0
From: Just a little outside San Antonio, Texas
Problems with Sunoco fuels??
My favorite and most convenient gas station sold ExxonMobile 93 octane gasoline. Good stuff and no problems whatsoever.
The station just got sold and is now selling Sunoco 93 octane. Was driving the car yesterday and, near the end of the 1.5 hour round trip, the engine stalled at two different times while sitting at stop lights. Started right up again with no problem.
No fault lights, codes, etc.
This has never happened before. Ever.
Has anyone had a similar problem with Sunoco fuels? Hmmm, could it be something else?
The station just got sold and is now selling Sunoco 93 octane. Was driving the car yesterday and, near the end of the 1.5 hour round trip, the engine stalled at two different times while sitting at stop lights. Started right up again with no problem.
No fault lights, codes, etc.
This has never happened before. Ever.
Has anyone had a similar problem with Sunoco fuels? Hmmm, could it be something else?
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
When ever I can fill up with Sunoco 93 I grab that chance. Car runs much better then BP or Amaco which use most of the time.
Wonder if your car just needs a few tank fulls to help ir clean out and change the fuels over?
Wonder if your car just needs a few tank fulls to help ir clean out and change the fuels over?
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
Originally Posted by ArmyVette
My favorite and most convenient gas station sold ExxonMobile 93 octane gasoline. Good stuff and no problems whatsoever.
The station just got sold and is now selling Sunoco 93 octane. Was driving the car yesterday and, near the end of the 1.5 hour round trip, the engine stalled at two different times while sitting at stop lights. Started right up again with no problem.
No fault lights, codes, etc.
This has never happened before. Ever.
Has anyone had a similar problem with Sunoco fuels? Hmmm, could it be something else?
The station just got sold and is now selling Sunoco 93 octane. Was driving the car yesterday and, near the end of the 1.5 hour round trip, the engine stalled at two different times while sitting at stop lights. Started right up again with no problem.
No fault lights, codes, etc.
This has never happened before. Ever.
Has anyone had a similar problem with Sunoco fuels? Hmmm, could it be something else?
Of course I contacted Sunoco because I had not seen this sticker on the pumps in another station in the same area.
They told me they all should have the stickers on them and sure enough later that week it appeared on the other stations pumps.
Now not being a chemist I did some research on this and found it takes roughly 300% more alcohol to produce the same BTU's as pure gasoline.
Since my FI engine was tuned with 93 octane Mobil, I have switched back with no ill effects.
But I have to wonder if using fuel with 10% ethynol may result in a lean condition at WOT?
Also I know from experience the rubber seals and hoses do not like any form of alcohol.
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
I suspect it is not the gasolione per se, but, rather water in the gas. I had the same thing happen several years ago with a brand on the Ohio Turnpike. Two bottles of Drygas solved the problem.
Fred K.
Fred K.
Melting Slicks
Joined: Jul 2004
Posts: 3,353
Likes: 0
From: Richmond Hill Ontario
Sunoco
In Canada, Sunoco sell 94 octane which I use exclusively in my 04 vette. I have never had a problem with it, but it could be possible that there was a little water in the fuel you were sold?
Safety Car
Joined: Apr 2004
Posts: 4,813
Likes: 2
From: We cant stop here... this is bat country
We have 94 Sunoco here in PA. I run it in my Vette, my 954RR, and used to run it in my Eclipse that ran 20lbs of boost. Never had a problem with it. We can also buy some 100+ at the local Sunoco. HOPEFULLY it was just the gas switch. 
Darroch Malone
Darroch Malone
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Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Originally Posted by corvettebob1
Here in MI. we have 94 octane Sunoco so I filled up one day (usually I use 93 octane Mobil) on the way back to the car I noticed a small sticker on the pump that said "This fuel contains 10% ethynol".
Of course I contacted Sunoco because I had not seen this sticker on the pumps in another station in the same area.
They told me they all should have the stickers on them and sure enough later that week it appeared on the other stations pumps.
Now not being a chemist I did some research on this and found it takes roughly 300% more alcohol to produce the same BTU's as pure gasoline.
Since my FI engine was tuned with 93 octane Mobil, I have switched back with no ill effects.
But I have to wonder if using fuel with 10% ethynol may result in a lean condition at WOT?
Also I know from experience the rubber seals and hoses do not like any form of alcohol.
Of course I contacted Sunoco because I had not seen this sticker on the pumps in another station in the same area.
They told me they all should have the stickers on them and sure enough later that week it appeared on the other stations pumps.
Now not being a chemist I did some research on this and found it takes roughly 300% more alcohol to produce the same BTU's as pure gasoline.
Since my FI engine was tuned with 93 octane Mobil, I have switched back with no ill effects.
But I have to wonder if using fuel with 10% ethynol may result in a lean condition at WOT?
Also I know from experience the rubber seals and hoses do not like any form of alcohol.
http://www.michigan.gov/mda/0%2C1607...75--%2C00.html
Le Mans Master
Joined: Jan 2003
Posts: 6,298
Likes: 0
From: Tyler TX
Originally Posted by Richin Chicago
I doubt there is any of the "corn states" that you can find a pump without ethanol. We have had it, for at least 10 years. Cars run fine on it.
http://www.michigan.gov/mda/0%2C1607...75--%2C00.html
http://www.michigan.gov/mda/0%2C1607...75--%2C00.html
Thread Starter
Le Mans Master
Joined: Sep 2003
Posts: 6,386
Likes: 0
From: Just a little outside San Antonio, Texas
Originally Posted by FKING1
I suspect it is not the gasolione per se, but, rather water in the gas.
Drove it around yesterday (Sunday) for a bit then topped the tank off (about 7 gallons worth) and drove it for another 1/2 hour. No problems and no stalling.
Did notice that the car idles at about 550 rpm with the air conditioning running and at about 750 rpm with the A/C turned off.
Chalk it up to the gremlins that infest our Vettes.
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
Originally Posted by ArmyVette
I guess that is possible though we haven't had a measureable rain in my neighborhood in a couple of weeks.
Fred K.
