Recomended gas question (87 octane??) - Page 2
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Recomended gas question (87 octane??) in Past Cadillac Vehicle Discussion; Hey Elwesso, why can't you dig up any threads like that about the heating problem in my 93!! Ha! Jack...
  1. #16
    CadillacJack76's Avatar
    CadillacJack76 is offline Cadillac Owners Fanatic
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    Re: Recomended gas question (87 octane??)

    Hey Elwesso, why can't you dig up any threads like that about the heating problem in my 93!! Ha!

    Jack

  2. #17
    elwesso's Avatar
    elwesso is offline Cadillac Owners Master
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    Re: Recomended gas question (87 octane??)

    No biggie.... Thats what Im here for!!!!

    Again, you have to agree that putting in anything less than premium is kinda stupid... You get lesser performance, and decreased gas mileage, and the THOUGHT of spark knock gives me fits and badspells....

    And also, I believe that the computer detects misses by the o2 sensors.... I could be wrong though..

    If I get a chance tomorrow afternoon, Ill dig up some threads if I can find any..... Give yourself a bump on your thread (post a message so that it returns to the new posts list) and Ill do it first thing tomorrow!

    EDIT: All you gotta do is use the search button at the top..... Type in the keyword and search all open forums...... I cant remember off hand what your heater dilemma is, but see what you can come up with.....

  3. #18
    CadillacJack76's Avatar
    CadillacJack76 is offline Cadillac Owners Fanatic
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    Re: Recomended gas question (87 octane??)

    Heck yea, I agree about the octane thing, if you can afford to buy and maintain a caddy you can afford the fuel expense, after all a Caddy was never built to be a practical car per say, it just kinda works out that way.


    Jack

  4. #19
    pink panther is offline Cadillac Owners Member
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    Re: Recomended gas question (87 octane??)

    The understanding of Octane levels helps the decision making process.

    Most people assume that higher octane burns hotter, therefore better performance.

    If lower octane burns lower, then no harm can be done by running lower octane.

    This is the farthest thing from the truth.

    The higher OCTANE level, the slower the fuel burns - therefore the more even the burn is through the compression stroke. Think of it as a longer burn.

    Run lower octane, and the fuel burns very rapidly, think explosive detonation. When this happens as the piston is coming up, huge forces are at odds within the combustion chamber.

    Early detonation can cause knock, and even destroy the pistons.

    A few extra $$ every fillup is cheap insurance to keep things together.

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