Need Professional and Experienced Expertise
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 13 of 13
Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Need Professional and Experienced Expertise in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Well I have recently bought a 2003 Cadillac CTS 3.2L and I took it to the dealer to have an ...
  1. #1
    starkcb is offline Cadillac Owners Member
    Automobile(s): 2003 Cadillac CTS 3.2L
    Join Date
    Feb 2008
    Location
    Arkansas
    Posts
    33

    Need Professional and Experienced Expertise

    Well I have recently bought a 2003 Cadillac CTS 3.2L and I took it to the dealer to have an oil leak checked. They told me it was possibly the valve covers as I have seen others speak about on this forum. I asked about adding Mobil 1 synthetic (extended performance)oil and they told me to be sure and not to add any synthetic oil to this engine. Every car that I have had for the last 5 years I have added synthetic oil and never had any trouble. I have noticed other CTS owners talking about adding synthetic oil and they mention no problems. I need everybody's 2 cents because I am confused right now.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Black4drCTS's Avatar
    Black4drCTS is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Cadillac CTS Luxury Black/Black
    Join Date
    Aug 2007
    Location
    Saint Louis
    Posts
    366

    Re: Need Professional and Experienced Expertise

    Well the 3.6 "requires" mobile 1 synthetic. was this a caddy dealer? or what?

  4. #3
    starkcb is offline Cadillac Owners Member
    Automobile(s): 2003 Cadillac CTS 3.2L
    Join Date
    Feb 2008
    Location
    Arkansas
    Posts
    33
    Thread Starter

    Re: Need Professional and Experienced Expertise

    Yes this was a Cadillac dealership. They did say that the 04's could take the synthetic but the 03's should not have any synthetic put in them.

  5. #4
    Black4drCTS's Avatar
    Black4drCTS is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Cadillac CTS Luxury Black/Black
    Join Date
    Aug 2007
    Location
    Saint Louis
    Posts
    366

    Re: Need Professional and Experienced Expertise

    i have had synthetic oil in every car ive owned. from a 92 s10 blazer to a bonnevile to a Grand Prix GTP to my CTS. I have yet to hear of it doing damage.. but hell the price of an oilchange has to be alot cheaper at the stealsership if they dont have to use synthetic.

  6. #5
    beniceb is offline Cadillac Owners Member
    Automobile(s): 2005 Cadillac CTSV
    Join Date
    Feb 2008
    Location
    Baltimore
    Posts
    5

    Re: Need Professional and Experienced Expertise

    the general rule of thumb i follow with synthetic oil is that once you begin using it, you should not go back to conventional oil. Also, you shouldn't mix conventional and synthetic. Drain all the conventional, change the filter and refill with only synthetic. Also, not sure if you were inquiring about synthetics to fix the oil leak, but my experience has been that the root cause of the leak needs to be addressed, ie broken gasket, over-tightened valve cover, etc. rather then a change to a "superior" type of oil....in my experience

  7. #6
    starkcb is offline Cadillac Owners Member
    Automobile(s): 2003 Cadillac CTS 3.2L
    Join Date
    Feb 2008
    Location
    Arkansas
    Posts
    33
    Thread Starter

    Re: Need Professional and Experienced Expertise

    Black4drCTS, thanks for the advice from experience. Just out of curiousity is your CTS the 3.2L. I think I am just going to go ahead and put in the synthetic after they fix the leak.

    Beniceb, I 100% agree with you in not trying to fix the leak with the synthetic oil. I apologize for not being clear. My question to the dealer was in reference to after fixing the leak.

  8. #7
    Custom88's Avatar
    Custom88 is offline Cadillac Owners Fanatic
    Automobile(s): CTS
    Join Date
    Aug 2007
    Location
    Battle Creek Michigan
    Age
    29
    Posts
    343

    Re: Need Professional and Experienced Expertise

    Is synthetic oil covered in the owner's manual at all? Might want to check into that and see what the GM engineers actually recommended for the 3.2L engine.

  9. #8
    Black4drCTS's Avatar
    Black4drCTS is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Cadillac CTS Luxury Black/Black
    Join Date
    Aug 2007
    Location
    Saint Louis
    Posts
    366

    Re: Need Professional and Experienced Expertise

    no mine is an 04 3.6. I would read your owners manual...... from cover to cover. I know the 3.6 is based off the northstar platforrm which is a "performance" engine. I have no clue where they pulled the 3.2 from.

  10. #9
    starkcb is offline Cadillac Owners Member
    Automobile(s): 2003 Cadillac CTS 3.2L
    Join Date
    Feb 2008
    Location
    Arkansas
    Posts
    33
    Thread Starter

    Re: Need Professional and Experienced Expertise

    Well I looked in the owners manual and found the following paragraph.

    "If you are in an area where the temperature falls below
    -20F (-29C), consider using either an SAE 5W-30
    synthetic oil or an SAE 0W-30 oil. Both will provide
    easier cold starting and better protection for your engine
    at extremely low temperatures."

    They recommend using 10W-30 in warmer climates, which is what I use. But they say you can use SAE 5W-30 synthetic oil in colder climates. I know there is a viscosity difference but if you can use a 5W-30 synthetic would you think I could use a 10W-30 synthetic also? As you can tell I really want to put synthetic in the engine I just do not want to screw it up.

  11. #10
    Black4drCTS's Avatar
    Black4drCTS is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Cadillac CTS Luxury Black/Black
    Join Date
    Aug 2007
    Location
    Saint Louis
    Posts
    366

    Re: Need Professional and Experienced Expertise

    Im not a mechanic... but i dont think it would do it any harm. If it were me, i would have changed it the day i bought the car. to a full synthetic. not a blend but a true Mobile 1 synthetic.

  12. #11
    Marlin's Avatar
    Marlin is offline Cadillac Owners Member
    Automobile(s): 2009 CTS
    Join Date
    Feb 2008
    Location
    Springfield VA
    Posts
    92

    Re: Need Professional and Experienced Expertise

    I was a auto-tech and can say your car can't tell the difference between the 2 just that one usually holds up better to heat and other factors.

    In fact MOST syn oil comes from the same oil that makes regular oil. It is called a group 3 hydrocracked oil. Just about all Syn in the US is made that way now.

    Now if you have a leak then syn will be a waste IMO as you engine is more open to letting in "dirt" so the syn would need to be changed just as soon as regular oil if the leak is pretty bad. if not then you could use a 10w30 syn and sun that till it is fixed.

    The only car i have seen that the maker said not to use syn was Mazda RX7/RX8. Thats because the wankle motor uses oil because of its type of seals and some syn did not burn very well. Other then that most cars and even trucks have a oil that will work in syn formula for them.

  13. #12
    starkcb is offline Cadillac Owners Member
    Automobile(s): 2003 Cadillac CTS 3.2L
    Join Date
    Feb 2008
    Location
    Arkansas
    Posts
    33
    Thread Starter

    Re: Need Professional and Experienced Expertise

    Well you all have been a big help. I am going today to buy the synthetic oil.

  14. #13
    briandors is offline Cadillac Owners Fanatic
    Join Date
    Mar 2003
    Age
    38
    Posts
    164

    Re: Need Professional and Experienced Expertise

    Sorry but I gotta correct a few things in this thread.

    First off the HF 3.6 is not based on the Northstar V8. There was a 3.5L "Shortstar" used in the Olds Intrigue and Aurora for a few years based on the Northstar, but that engine was expensive, and not that reliable and got axed.

    Secondly there is no harm in mixing ANY oils. Different brands, different types (regular & synthetic), different viscosities. I'm not saying I recommend it, because the detergent adds, viscosity modifiers, and anti wear ingredients that each oil has may or may not compliment each other well. Some oils features lots of Na, other lots of Zinc, or Molybdenum.... getting a little of each may be slightly worse than sticking to one chemistry in particular.

    Nonetheless the idea that you mix two and will cause major engine damage is false.

    For example, every oil company out there sells a synthetic-blend these days.

    If you're leaking, and running regular, I wouldn't switch to synthetic unless you're ready to truly fix the leak. Synthetics will tend to clean the gaskets more, which will dislodge small dirt particles stuck in gaskets, preventing the leaks from getting worse. You dislodge that sludge and they may pour.

    If you're not leaking at all, feel free to switch.

    Final point: today's regular oils aren't nearly as low on the totem pole compared to synthetics as the situation used to be. The stock oils are quite similar and there's very sophisticted add packs in each. Whereas it used to be that a regular oil lasted 3000 miles and synthetic perhaps 10000, today's good dino oils can go 7000 miles in certain engines, under certain use. The gap between the two is shrinking.

    If you want to learn a LOT more, spend a few weeks at www.bobistheoilguy.com just reading. Lots of chemists and engine experts and you will learn more than you ever dreamed.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting