7.5 or 8 Quarts of Oil for the DTS????
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Cadillac DTS Forum - 2006 through 2012 Discussion, 7.5 or 8 Quarts of Oil for the DTS???? in Past Cadillac Vehicle Discussion; Most NorthStar Engines call for 7.5 quarts of oil. However, why do I always need to add 8 quarts of ...
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    tjwhite721's Avatar
    tjwhite721 is offline Cadillac Owners Fanatic
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    7.5 or 8 Quarts of Oil for the DTS????

    Most NorthStar Engines call for 7.5 quarts of oil. However, why do I always need to add 8 quarts of oil? Every-time I go to the dealer to get my oil changed, I check it after they change it, it's always a half quart low. If I go to a local mechanic, he adds 8 quarts.

    What is the correct quart amount for the DTS?

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    Cadillac Cust Svc's Avatar
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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    Hello tjwhite721,

    I researched this question and in your owner’s manual in chapter 5, page 101 it states that the capacity of your engine oil is 7.5 quarts. I hope this information helps! Feel free to private message me if you have any further questions or concerns. Thank you very much for your time.

    Gregory W.
    Cadillac Customer Care

  4. #3
    Andrew Armitage Guest

    Re: 7.5 or 8 Quarts of Oil for the DTS????

    Normal reading on the dip stick should be 1/2 way up the area marked full.

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    MoistCabbage's Avatar
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    Half way up the hash marks is FULL (xxxxxXxxxxx)

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    TulsaVic is offline Cadillac Owners Enthusiast
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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    Just guessing: 7.5 for the engine, 0.5 for the new oil filter??

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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    Thanks everyone for your responses. I was used to measuring the oil using the old quarter quarter lines dip stick off my old SLS. Yes, the DTS has xxxxXxxxx as a measuring guide. So the big X in the middle is the FULL measuring? That is kind of odd to me.

    I would think the big X in the middle of the measuring groves to represent half a quarter or half a quart low and time to add oil.

    TulsaViv, that is what someone told me as well. The oil filter takes about 0.5. Not sure that is why it turns out to be 8 quarts???

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    Submariner409's Avatar
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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    Bottom line: 7.5 quarts WITH (including) filter. Oddball - yes. My Ford 4.6 in the truck takes 6.5 - same operating range.

    The hashmark is the "operating range" of oil levels. The highlighted center X is the design desired level.

    In my 2002 I run the level in the bottom third of the hashmark and get just about 6,000 miles per quart of 5W-30 synthetic. No leaks, either.

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    Superjim's Avatar
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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    Just a thought....
    Maybe the big "X" in the middle is correct if you are checking it when the engine is COLD...
    Don't know for sure... just a thought...

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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    .............. and "cold" would be the desired level just after an oil/filter change............. no way will you or the Oil Doodle get that nice, clean new oil up to the normal 190 - 220 degrees in 2 minutes of idling.

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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    I just looked at the dipstick in my car...
    It does NOT have a highlighted or large X in the middle of of the hashmarks.
    .
    .


    ----------

    The oil level is between 3/8 and 1/2 inch below the TOP hash mark...
    This is where it always is when the engine is cold...
    Hard to see in this picture... the oil is clean...
    .
    .


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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    ........... and they seem to have changed the markings sometime after 2003 - the earlier 2000's dipsticks look like this ..........

    <==== ADD XXXXXXXXXX OPERATING RANGE ==============oo==============================O

    ........ and exactly 7.5 quarts including filter puts the level at XXXXXXXXXX

    (the two "o" marks are rivets)

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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    Now that you mention it... I remember the rivets in some of my older cars....
    Ludacrisvp likes this.

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    jazoo is offline Cadillac Owners Fanatic
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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    Quote Originally Posted by tjwhite721 View Post
    Most NorthStar Engines call for 7.5 quarts of oil. However, why do I always need to add 8 quarts of oil? Every-time I go to the dealer to get my oil changed, I check it after they change it, it's always a half quart low. If I go to a local mechanic, he adds 8 quarts.

    What is the correct quart amount for the DTS?
    Page 101 of the Owners Manual defines capacities of various fluids. It clearly says that the capacity is 7.5 quarts for Engine Oil with Filter. I do not add more than the specified amount as I am afraid of the following shown on Page 5-41:

    Notice: Do not add too much oil. If the engine hasso much oil that the oil level gets above the
    cross-hatched area that shows the proper operating
    range, the engine could be damaged.

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    The engine's not going to be damaged by an extra half quart of oil. Even a quart and a half over wouldn't do anything.

    Anything over 7.5 will be consumed fairly quickly. It's wasteful, that's why the capacity was initially reduced.

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    BlueAngel#07's Avatar
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    Re: 7.5 or 8 Quarts of Oil for the DTS????

    ODDLY strange, ...I just got off the phone with my cadillac dealer in regards to what is full on the dipstick. I was told that the full range was at the top of the crosshatching on the DTS, and the difference between the center and the top was about a 1/2 quart,

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