Can't hurt. Probably doesn't help

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Can't hurt. Probably doesn't help Posted by Ari [Email]

(#2847) [Profile/Gallery] (more from Ari) on Fri, 28 Jan 2005 20:25:53

In Reply to: Sludge problem and oil volume?, R. Frist, Fri, 28 Jan 2005 18:54:38 Members do not see ads below this line. - Help Keep This Site Online - Signup

I believe that the sludge issue is primarily related to not frequent enough oil changes. Now, more oil may help some to dilute sludge, but I don't think it helps that much. I own a '97 9000 with a 5-quart sump - I know for a fact that the car is on it's second engine, the first engine dying at 45K due to sludge. Hey, the first 45K was a lease car! I wonder how many oil changes it had?

I would say that 5 quarts instead of 4 means that you might have a little more margin. But you can kill a 5 quart car without frequent oil changes.

Summary - change the oil frequently and regularly. It's cheap insurance. In the Old Days, we changed the oil every 3K miles. And recommended oil change intervals extended to 5K, 7.5K, 10K. Not just Saab, but most all cars. And interestingly, most all cars out there, not just Saabs, are showing sludge issues. I've heard of it on the vauntedly reliable Toyotas. With modern engines and modern oils, you can go further between changes. But how long? I guess we're finding out now.

Now, with modern engines and modern oils, I try and change the oil every 3K, but don't panic if it's 4K. But 7.5K? No way.

posted by 12.76.15...

Posts in this Thread:

Sludge problem and oil volume?, R. Frist, Fri, 28 Jan 2005 18:54:38
- Re: Sludge problem and oil volume?, Ian Glenday , Sat, 29 Jan 2005 12:18:46
  - Maybe that is part of the problem., R. Frist, Sun, 30 Jan 2005 07:39:48
    - Mine Has Made It to 168,000 miles, Ian Glenday , Mon, 31 Jan 2005 12:51:02
      - Mobil 5W-50 vs other oils and oil sludge, Matjaz Slovenija, Sun, 13 Feb 2005 02:03:51
      - Mobil 5W-50 vs other oils and oil sludge, Matjaz Slovenija, Sun, 13 Feb 2005 02:03:51
        Re: Mobil 5W-50 vs other oils and oil sludge, Matjaz S, Fri, 18 Feb 2005 09:40:13
- Can't hurt. Probably doesn't help, Ari , Fri, 28 Jan 2005 20:25:53 <-- Viewing This Message
  - OIL SLUDGE REPAIRS, Tashfeen Qayyum, Sat, 29 Jan 2005 02:35:20
    - Does it mention why this happens? (besides short, trips in cold weather), Sat, 29 Jan 2005 05:58:51
      - Re: Does it mention why this happens? (besides short, Kenw51, Sat, 29 Jan 2005 20:37:46
      - Because of a flaw, the engine is harder on the oil, AdamB , Sat, 29 Jan 2005 20:19:15
        Are you sure.., Sten, Sun, 30 Jan 2005 02:07:28
        Yes.., AdamB , Sun, 30 Jan 2005 02:47:03
        YOur contention about semi synth, Louis, Mon, 31 Jan 2005 07:57:16
        Reply to Louis, Sten, Mon, 31 Jan 2005 09:02:10
        BTW: If a previous owner used semi-synth, AdamB , Sun, 30 Jan 2005 02:50:45
      - Re: Does it mention why this happens? (besides short, Tashfeen Qayyum, Sat, 29 Jan 2005 06:24:17
        Re: Does it mention why this happens? (besides short, Dean, Sun, 30 Jan 2005 11:01:01
        Re: Does it mention why this happens? (besides short, 9to5, Sat, 29 Jan 2005 07:35:32
        They must have a solution, as the problem has....., MI-Roger , Sat, 29 Jan 2005 10:05:36
        short trips + cold weather = frequent oil changes, Aero'ed, Sat, 29 Jan 2005 07:46:21
        other solution: use only in hot weather on long trips n, dtech, Sat, 29 Jan 2005 07:52:28
        best solution - car on jackstands, disconnect battery, :-), Sat, 29 Jan 2005 09:18:09
        Re: best solution - car on jackstands, disconnect batte, Rob , Sat, 29 Jan 2005 17:21:34

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