[T3] Update with a Bowl Full of Rust Flakes

[SCS Crewcab]

So, do you think it's better to store a car with a full tank mixed with 
oil rather than an empty tank? If so, why?


On 7/23/2011 9:57 PM, Jim Adney wrote:
> On 23 Jul 2011 at 21:28, SCS Crewcab wrote:
>
>> Even with oil, fuel with ethanol will still attract moisture. Since oil
>> and gas is lighter than water, the water will end-up on the bottom of
>> the tank. If I was storing a car, I would drain the tank and remove the
>> fuel tap so any condensation that forms in the tank will drain out.
> I'm sure situations can vary, but I've stored cars for years with no
> difficulty, and the summers here are far from arid. The key is to
> store them with a full tank and make sure there are no excess places
> for air to get in or out. There should be one and only one vent path.
>
> Assuming you don't have liquid water getting into the tank, the main
> source of water getting in there is from dew forming in the air space
> above the gas. This happens because barometric pressure changes cause
> air to "breath" in and out of the tank. Minimize the amount of air
> space and you minimize the "breathing."
>
> Gasoline must also have some corrosion preventative properties,
> because you never see rust in tanks that have been in regular
> service, unless water gets splashed in there for some reason. I
> suppose adding some oil to the gas might offer some additional
> protection, but I doubt if there's much to gain.
>
> Ethanol may make some difference, but ethanol will keep a certain
> amount of water in solution without a problem. I'm not sure, but I
> suspect that once there's more water in there than the ethanol will
> hold, it is no longer hydroscopic.
>