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HT4100 4.1, 4.5, 4.9 Discussion, oil in Cadillac Engine Technical Discussion; Just wanted to know whats the best oil for cadillacs?? I have a 94 caddy deville 4.9 just want to ...
  1. #1
    madcad04 is offline Cadillac Owners Member
    Automobile(s): 94 sedan deville
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    oil

    Just wanted to know whats the best oil for cadillacs??
    I have a 94 caddy deville 4.9 just want to know whats the best oil to use....

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  3. #2
    derrty_deville's Avatar
    derrty_deville is offline Cadillac Owners Enthusiast
    Automobile(s): 1993 Cadillac CDV 102k
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  4. #3
    noahsdad's Avatar
    noahsdad is offline Cadillac Owners Connoisseur
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    Re: oil

    Oh boy.

    This is a loaded question that's been discussed many times here. I'd suggest first reading some previous posts by doing a forum search.

  5. #4
    derrty_deville's Avatar
    derrty_deville is offline Cadillac Owners Enthusiast
    Automobile(s): 1993 Cadillac CDV 102k
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    Re: oil

    That last thread kinda covererd it pretty quick.

  6. #5
    Kcryan is offline Cadillac Owners Fanatic
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    Re: oil

    how many miles, if less than 75k, mobil one or penzoil platinum, if over 150k, then shell rotella, if anywhere in between, either...thats just a very quick reccomendation though,

  7. #6
    MachX's Avatar
    MachX is offline Cadillac Owners Fanatic
    Automobile(s): 1991 Sedan deVille 4.9L/1994 Lincoln Town Car 4.6L
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    Re: oil

    In my two Deville's I've used Penzoil, Valvoline, and the Shell Rotella. Since I've switched to Shell gas because of the Top Tier recommendation, I figure the Shell oil is good too. But since any oil I've seen conforms to 'OEM specifications' I don't think it makes a difference if you change every 3k miles like you're supposed to. Synthetic oil may hold its viscosity longer, it costs more so there really isn't any savings. And since 4.9's don't rev beyond 4000 rpm, I don't think synthetic is needed. Just use the Shell stuff.

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