Isopropyl Dry Gas and the 2004 DeVille
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Isopropyl Dry Gas and the 2004 DeVille in Past Cadillac Vehicle Discussion; Guys, My 2004 DeVille owners manual specifically stated that the owner SHOULD run ethenol gasoline in the car. I've been ...
  1. #1
    DevilleNut is offline Cadillac Owners Member
    Automobile(s): 2004 Cadillac DeVille DHS
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    Isopropyl Dry Gas and the 2004 DeVille

    Guys,

    My 2004 DeVille owners manual specifically stated that the owner SHOULD run ethenol gasoline in the car.

    I've been reading about some of the detrimental effects of ethenol in gasoline. One that was particularly mentioned is that the ethenol will absorb water from the air, but when it does so, it separates from the gasoline and lays in the bottom of the fuel tank where it can contribute to rust and corrosion. One author stated that the solution for this problem is to add isopropyl dry gas when filling the tank. The isopropyl alcohol will absorb water but keep it in suspension so that it is burned along with the gas and will not contribute to fuel system corrosion.

    What I would like to ask is if there is a problem with adding isopropyl alcohol to the fuel in the 2004 DeVille.

    Thanks,

    Bob

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  3. #2
    Caddy-EaRL's Avatar
    Caddy-EaRL is online now Cadillac Owners Fanatic
    Automobile(s): 2000 Deville DTS 184,000 miles, 91 chevy truck 380,000 miles
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    I'd just run a top tier regular gas and be done with it with no worries. My
    DTS is 13 years old with 174,000 miles and my mom who owned it until 2013 when I got it always ran regular gas from wherever she was when she needed gas, hasn't had any issues.

  4. #3
    JimD is offline Cadillac Owners Connoisseur
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    Re: Isopropyl Dry Gas and the 2004 DeVille

    Quote Originally Posted by DevilleNut View Post
    My 2004 DeVille owners manual specifically stated that the owner SHOULD run ethenol gasoline in the car.
    If you are reading that "SHOULD run ethanol" into the words on page 5-6 of the Owners Manual, you left out the part that says
    "....GM recommends you use these gasolines, particularly if they comply with the specifications described earlier."

    You will have to search to find gasoline that does not contain ethanol.
    ....One author stated that the solution for this problem is to add isopropyl dry gas when filling the tank. The isopropyl alcohol will absorb water but keep it in suspension....
    What would be the point? Ethanol is alcohol (specifically corn mash alcohol, AKA moonshine).

  5. #4
    basscatt's Avatar
    basscatt is offline Cadillac Owners Master
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    Re: Isopropyl Dry Gas and the 2004 DeVille

    One that was particularly mentioned is that
    the ethenol will absorb water from the air,

    well - just think about that for a minute -

    how much "air" is in your gas tank -

    how much water can that amount of air hold -

    pump gas is 10% alcohol -

    do the math -

    then IGNORE what you read on that site -
    in fact - NEVER GO BACK TO THAT SITE AGAIN -
    --------------------------------

    the reason people use "HEET" - alcohol - during the winter -
    is that alcohol readily mixes with water -
    and unless there is a LOT of water - and I mean REALLY a LOT -
    that water/alcohol mixture readily mixes with gas -
    and the motor quite happily burns it -

    One author stated that the solution for this problem
    is to add isopropyl dry gas when filling the tank

    with a full tank of gas -
    you already have almost 2 GALLONS of alcohol in the tank -
    does it make ANY sense to add another 12 ounces -

    do you think 12 more ounces - on top of almost TWO FULL GALLONS -
    is going to make ANY difference?

  6. #5
    cadillac_al is offline Cadillac Owners Connoisseur
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    Re: Isopropyl Dry Gas and the 2004 DeVille

    I hardly ever see anybody buying dry gas anymore. All the gas stations and stores used to have cases of it sitting around. Now they have just a few bottles on a back shelf somewhere. It is no longer needed.

  7. #6
    Submariner409's Avatar
    Submariner409 is online now If it won't run, stick on fender vents
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    Re: Isopropyl Dry Gas and the 2004 DeVille

    DevilleNut, Your surfing has turned up yet another bad example of witchcraft and hearsay. Maintain the car, keep it clean, run a Top Tier gasoline and drive happily.

    The sheer amount of gasoline run through your car's fuel tank makes the ethanol-water-separation lie all the more hilarious.

    (Now, if you own a boat with large fuel tanks that will sit unattended or partly filled for 3 - 12 months at a time, then the ethanol water absorption possibility dictates preventive measures - which is why boats have a combination fuel filter/moisture separator installation. Motor vehicles don 't need them .......)

  8. #7
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
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    Re: Isopropyl Dry Gas and the 2004 DeVille

    I have about 6-8 bottles of "gas drier" still on a shelf in the garage. Pay for the shipping and it's yours.

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