If you are using a PON 93 as recommended by Chevrolet, the fuel will remain in spec for about 9 months. Lower octane fuels such as an 87 will remain in spec about 3 months so require a stabilizer. Here, 93(Shell) and 94(Chevron) contain no ethanol.
 
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I know it’s doesn’t say C8, but I recommend checking this article out as current fuel delivery systems are relatively the same.

Thanks Corey,
Those actually are some good points. Keeping moisture out was the exact reason for keeping the tank full. Times have changed and it makes complete sense as described.
 
A 1/4 tank has been recommended since the C5 and here is why :


The system is sealed and the old "water vapor" concern is not there any longer.

I never did, but make sure the tank is full and there is no ethanol in the gas.
 
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A 1/4 tank has been recommended since the C5 and here is why :


The system is sealed and the old "water vapor" concern is not there any longer.
Question: There is a hole in the gas cap on the C5 at least. Same as was on my 2000 Camaro. It allows air in to equalize pressure as the volume of fuel in the tank decreases. Does that air not contain moisture? I'm sure it does. However, I suppose the moisture isn't as bad as the contaminating the parts with build up. Wise to go with an expert though. So from now on it's a quarter tank.
 
Only 126 days til spring, then we won’t have to worry about this!

yes, I have a count down on…😀😀😀
 
I know it’s doesn’t say C8, but I recommend checking this article out as current fuel delivery systems are relatively the same.

Check out this article and video - it is absolutely true!!
I wrote a note about exactly this a couple of months ago. Not that I want credit, but what do you do in the spring when your sender unit is all contaminated and your C5, C6 or C7 fuel gauge is reading incorrectly? When I first got my 1999 about 10 years ago I thought same as everybody else and filled my tank full for the winter to eliminate condensation. I as not aware that these fuel tanks are sealed. In the spring my fuel gauge gave all kinds of false readings.

Fortunately I have a friend who is a Corvette General Motors specialist and he gave me the solution. Here it is. Just get a 295 ml (10 oz) bottle of Chevron Techron Complete Fuel System Cleaner and add it to a full tank of gas. Voila - works like a miracle. Cleans the sender contacts and you don't have to pull the fuel tank and sender/pump assembly. Only problem is I don't know where to buy this stuff in Canada. Luckily for me Detroit is five minutes away across the Ambassador Bridge where you can buy Techron at Walmart. I do see it on Amazon for about $25 US but the packaging looks like it has been updated.

Maybe you could try the CTC cleaner but I do not know if this works, Perhaps some one on this forum has experience with a Canadian solution. I have no information on the C8.
 

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Fortunately I have a friend who is a Corvette General Motors specialist and he gave me the solution. Here it is. Just get a 295 ml (10 oz) bottle of Chevron Techron Complete Fuel System Cleaner and add it to a full tank of gas. Voila - works like a miracle. Cleans the sender contacts and you don't have to pull the fuel tank and sender/pump assembly. Only problem is I don't know where to buy this stuff in Canada. Luckily for me Detroit is five minutes away across the Ambassador Bridge where you can buy Techron at Walmart. I do see it on Amazon for about $25 US but the packaging looks like it has been updated.

Maybe you could try the CTC cleaner but I do not know if this works, Perhaps some one on this forum has experience with a Canadian solution. I have no information on the C8.

I bought Sea Foam. A lot of people swear by that. There are a lot of reputable names at C.T. from STP to Gumout and Lucas
 
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I have learned not to trust anything on the internet unless fact checked. With regard to the video, it mentions:
"Paul highlights Chevrolet engineering’s recommendations for storing C5, C6 and C7 Corvettes with only a quarter tank of gas"
So the prudent thing would be to examine the Chevrolet engineering's recommendation as a document or FAQ or something. Does anyone have or seen this from Chevrolet? I am just trying to verify.
 
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I wonder if all the gas detergents and additives you find in the gas sold by the "top tier gas" sellers (Esso, Shell, Costco and others) do the same as additives such as Sea Foam. Maybe not and due to the cost of some Sea Foam (less than 15 bucks) I'll probably mix it with my fuel along with fuel stabilizer, when parking my car. My thanks to Murray and the OP 1 BAD 9T9 for drawing this to my attention. For anyone interested, a listing of those top tier sellers in Canada is found below (just click on "Canada"), although I'd understood that Petro-Canada was one but don't see it on the list:

 
I see that Techron is available on Amazon.ca, for anyone in Canada wanting to try it, however it's more expensive than Sea Foam:

Amazon product ASIN B000CCOL3I
?Apparently I can't post a link to Amazon.ca but if you search "Techron" you'll find it.

Then if you want to weigh in on the debate as to which product is better, here are a few references for you to check out which both seem to indicate they have their individual strengths:




As usual, there's no end to products you can use on your vehicle...
 
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As mentioned I like to examine the originating references so as far as Techron here's what Chevron says:
"If you regularly use a high-quality gasoline such as Chevron, Texaco and Caltex gasolines with Techron®, you probably do not need to use the bottled Techron®."
 
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