05 STS V8 4 motor oil, 8 quarts? Really? - Page 2

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Cadillac STS Forum - 2005 through 2012 Discussion, 05 STS V8 4 motor oil, 8 quarts? Really? in Past Cadillac Vehicle Discussion; 96 sedan deville took damn near 10 ill say 9.5 my 97 took 9. my dts took 9. my 2006 ...
  1. #16
    Charles Warren's Avatar
    Charles Warren is offline Cadillac Owners Fanatic
    Automobile(s): 2008 sts-v black raven 2004 cts black raven
    Join Date
    Nov 2011
    Atlanta, Georgia, United State

    Re: 05 STS V8 4 motor oil, 8 quarts? Really?

    96 sedan deville took damn near 10 ill say 9.5 my 97 took 9. my dts took 9. my 2006 sts takes 9. cts takes 6. i let mine drain till its trickling then put plug on and take it back off then let it drain some more while i check under the car for leaks and rust and other mishaps. i just buy 2 5 qt jugs of synthetic from walmart and be done, the extra quart either goes in cts if i chang both at the same time. funny my gtp only holds 4.25 or 4.5 if i use the blazer filter

  2. #17
    REALTORBENJAMIN is offline Cadillac Owners Fanatic
    Join Date
    Dec 2012

    Re: 05 STS V8 4 motor oil, 8 quarts? Really?

    Does it really need Mobil 1 Synthetic, or can we use any Synthetic Oil that meets GM4718M as per the Owner's Manual? (Mobil 1 for 8 quarts is like $100 bucks.)

  3. #18
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    Re: 05 STS V8 4 motor oil, 8 quarts? Really?

    My 1957 Jaguar XK140MC DOHC straight 6 took 14 quarts of straight SAE 30.

    Guess what cools your engine's crank, rods, bearings, chains, cams, oil pump, valve tips, springs, piston skirts and other rotating guts - it sure isn't coolant ...... My marine olds 455's run 8-quart Milodon pans. Cooling.

    ......... and that oil runs normally at about 200 - 220 degrees. Why ? Because it needs to in order to flow properly (lubrication is flow, not pressure) as well as boil off the nasties from combustion blowby condensation and internal crankcase moisture. Look up "sludge' and see what causes it: cold oil.

    GM won't tell you, but it publishes a list of the oils that meet their various engine specs - nearly every name brand of synthetic meets their current normally aspirated (NA) specs. Do some Google searching - "general motors approved engine oils" or something close.

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  5. #19
    johng99 is offline Cadillac Owners Member
    Automobile(s): 2005 StS V8
    Join Date
    Aug 2013
    Southern Indiana

    Re: 05 STS V8 4 motor oil, 8 quarts? Really?

    My Mercedes 560SEC had quite a large oil sump - I don't remember exactly but something on the order of 9 quarts or so. I had to change out the leaking head gaskets (see it's not only Cadillac) but the amazing things were how clean the engine was (cams, sprockets, cylinders, etc.) and how little wear we encountered at 180,000 miles. We did not do a valve job on the engine as everything was still well within it's life. Did install a new timing chain while we were at it, although the old one was still within stretch limits (but getting close). I attribuite the long life to a large oil sump and oil changes every 5k.
    My MB diesel also has a large oil sump and is still going strong at 220,000 miles. Today it is my son's daily driver.
    I was pleased to hear that the N* was designed this way as I plan on keeping it a while.

  6. #20
    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: 05 STS V8 4 motor oil, 8 quarts? Really?

    Oil is good; more is better (except for mileage). It cleans, cools, seals & lubricates. Mobil1 is $27 for 5 quarts at Walmart; more or less in some markets. I get about 10,000 miles before the OLM tells me to change the oil. Sooo, doing the math, I spend roughly $0.0046 per mile (including sales tax) for Mobil1. It's cheap and the car has over 88,000 miles and rarely needs any added at all.

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