FW: <VV> Gas Tank

[FrankCB at aol.com]

Guy,
    While it is quite true that many locations  (including northern NJ) now 
have 10% ethanol in the gas, I don't believe  that fact eliminates the 
necessity of adding isopropanol (isopropyl alcohol)  periodically to the gas tank to 
keep water from coming out of solution and  falling to the bottom of the tank 
to start forming rust.  First, it's very  expensive in producing ethanol to 
remove the water much below the 10%  level.  Anhydrous ethanol, while possible, 
is unlikely to be the quality of  the ethanol actually mixed with the gasoline. 
 Second, pure alcohol is  quite hygroscopic which means it will readily 
absorb water from the air or from  the storage tank or piping through which it 
moves.  So I consider the  periodic addition of isopropanol to be like insurance.  
If it keeps from  having to replace another fuel tank and contents, it's well 
worth the  expense.
    I would also recommend that an infrequently used  Corvair should have its 
gas tank kept as full as possible.  That minimizes  the amount of moist air 
above the gas level in the tank so there is less  moisture to condense out and 
fall into the gas.
    Frank "foresight better than hindsight"  Burkhard
 
In a message dated 11/17/2006 12:08:01 PM Eastern Standard Time,  
GBrandes at loebermotors.com writes:

Hi  all,

In many states the fuel already has ethanol added and if so  you
shouldn't have to add dry gas.  If I'm mistaken on this please let  me
know.

Regards,

Guy Brandes
65 VAIR  140