Following comments are based on use and sales of synthetic lubricants for over 24 years now, and use in Saabs for that long.

There are still many myths about synthetic oil. You can change from synthetic to non-synthetic and/or semi-synthetic and back again with no problems in any sound engine. All synthetics on the market today are compatible with non-synthetics and, far as I know, with other synthetics.

Synthetics reduce engine wear. Synthetics run with less friction and therefore the oil will run cooler. Synthetics have greatly increased film strength. There is more difference between brands of synthetics than there is between brands of non-synthetics.

You can certainly compound your own blend by mixing and matching oils, but why? The engineers who built the synthetic also did their best to blend a suitable additive package. Depending on the synthetic involved, they probably very carefully cost-engineered the same<g>.

Using heavier than xW-30 synthetic in almost all engines will not give greatly enhanced protection, but will give reduced performance.

Oil doesn't wear out? Well, it darn sure oxidizes and passes off the lights. If you don't think so, cook a cup of oil in the oven overnight at 350 F. Synthetic is much more stable. This is the major reason that oil drain intervals can be extended with a properly formulated synthetic. This has been validated for almost 30 years now, using oil analysis, fleet tests, and actual road use vehicles.

• 9-5 posting- synthetic vs conventional oil, GaryG, Tue, 26 Jun 2001 14:41:22
  • Re: 9-5 posting- synthetic vs conventional oil, Dick in Falls Church, Thu, 28 Jun 2001 17:34:27 <-- Viewing This Message
    • Re: syn oil manufacturers don't do anything special w/ additives, Sjer, Sat, 30 Jun 2001 13:10:37
  • No, no and no..... (long), VIKINGMAN, Tue, 26 Jun 2001 16:03:42
  • Would 2 bottle Mobil 1 synth + 2 bottle fossil oil qualify as a, Hatch_92T23AT, Tue, 26 Jun 2001 15:24:33
    • No! never mix conventional oils w/synthetics, JMC, Tue, 26 Jun 2001 15:45:48
      • I am using 50% synth 50% fossil and engine has never been happier, Daren, Tue, 26 Jun 2001 23:17:20
      • Saab uses..., VIKINGMAN, Tue, 26 Jun 2001 16:06:17
        • Saab Turbo Oil is 5W30 semi-synthetic and apparently only for 9-X, ls, Tue, 26 Jun 2001 17:01:16
          • There's turbo oil and then there's turbo oil..., VIKINGMAN, Wed, 27 Jun 2001 09:23:50
          • Saab dealers used it in all 3 of my 9000s, BillJ, Tue, 26 Jun 2001 18:39:10
  • Unusual wear patterns? Can he/you elaborate on this? Thanks n/m, Aaron Gilbert, Tue, 26 Jun 2001 15:15:20

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