STS N* v8 MPG - Page 3

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Cadillac STS Forum - 2005 through 2012 Discussion, STS N* v8 MPG in Past Cadillac Vehicle Discussion; I don't necessarily disagree....
  1. #31
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
    Automobile(s): 2006 STS4 V8 1SG & 2007 STS V8 1SE
    Join Date
    Jun 2008
    Cedarburg, WI

    Re: STS N* v8 MPG

    I don't necessarily disagree.

  2. #32
    Guy.Seminerio is offline Cadillac Owners Connoisseur
    Automobile(s): '79 coupe deville
    Join Date
    Feb 2013
    Whitestone, NY

    Re: STS N* v8 MPG

    That's basically how I do my air. If it wears too much on the edges which I hate I just add more air. Although I've moved to nitrogen to avoid variables such as outside temp and speed as much as possible. Keeps the PSIs more constant instead of it fluctuating.

  3. #33
    is3_ftw is offline Cadillac Owners Member
    Automobile(s): Soon
    Join Date
    Mar 2010

    Re: STS N* v8 MPG

    ^^^I have read a few posts about nitrogen in the past couple yrs. I might just pull the trigger and try it

  4. #34
    mckellyb is offline Cadillac Owners Enthusiast
    Automobile(s): 2005 STS N*, 1SF, 136K mi.
    Join Date
    Apr 2011
    Fort Worth

    Re: STS N* v8 MPG

    Quote Originally Posted by EChas3 View Post
    I don't necessarily disagree.
    I understand, it's just I've had people question my logic for, well, a few decades, now.

    It's really noticeable on a two-wheeler, when 2PSI can make a very obvious change in pretty much everything.

  5. #35
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 65500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    Re: STS N* v8 MPG

    Quote Originally Posted by Cadzilla8 View Post
    Could putting 10w oil instead of 5w cause the engine to work harder and give worse mpg?
    No - 5W-XX flows a bit better at cold start - the final number: -30 is the warmed-up running engine oil viscosity figure.

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