Topic: 79 Gas Tank
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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Yes, it does have a bladder. But I would think that unless the badder deforms, condensation shouldn't be a problem.
Barry
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Kevin, unfortunately from 78-82 the tanks did use a bladder. If you are interested, you can buy a new tank that doesn't have the bladder. They're 18 ga. rust resistant steel.
corvette440hp
Thanks guys.
With winter storage just around the corner I'm debating how important it is to completely fill the gas tank.
I always have in the past but my concern is with this newer gasoline going bad in shorter time periods.
(In the past I start the winter with a completely full gas tank. I start the engine about every ten days or so and run it for 20 minutes all winter long.)
Kevin, if you put StaBil into the tank and keep starting the engine it will be fine. There are differing theories on whether to fill or leave partially filled, so in the spring you can add some of the new season's fresh gas. In your case, you'll need some fresh fuel to replace what you used during the winter. Fuel is blended differently for the different seasons.
corvette440hp
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The bladder isn't a bad thing. It's like having a fuel cell inside a steel liner. Mine was in great shape!!
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I think the higher levels of ethanol in the fuels today, and the increased amounts that are coming, are gonna play havoc on the bladders in the Shark fuel tanks. They already have issues with them deforming....I believe the ethanol is gonna make that even worse.
Adding some sort of fuel stabilizer is a good idea, but I would add it at the fuel station, and then drive the car a few miles to really mix it in the tank, as well as all thru the fuel system. At this point, I don't think it will matter if the tank is full or half full....between the water in the fuel to start with, and normal condensation, the tank is gonna have water in it anyway. The fuel stabilizer is the best insurance for that.
Adding some sort of fuel stabilizer is a good idea, but I would add it at the fuel station, and then drive the car a few miles to really mix it in the tank, as well as all thru the fuel system. At this point, I don't think it will matter if the tank is full or half full....between the water in the fuel to start with, and normal condensation, the tank is gonna have water in it anyway. The fuel stabilizer is the best insurance for that.
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If the tank is full, then there is less air in the tank and it's the moisture in the air that condenses into water. You should also put in the additive.
Dave
Lifetime Member #116
Dave's '82 
I always top mine off and add stabil at the pump, about 5 mile drive home.
ebo
Interesting that my purist vete mechanic always told me to shut it off and not to start it till spring. As all that cold then heat then cold creates moisture thru out engine, drive train, and exhaust. I disconnect battery, cover it and thats it. doing it the same way for over 30 years.
This year I did invest in a car bag.
ebo
eboin Forum: C3 Fuel, Emission Control, and Exhaust Systems
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