Re: Viscosity - Saab 9000 Bulletin Board - Saabnet.com
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Re: Viscosity
Posted by ls (more from ls) on Thu, 7 Jun 2001 11:13:15
In Reply to: Viscosity, Robert Davis, Thu, 7 Jun 2001 00:18:00
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The points made in VIKINGMAN's reply to you (below) seem to make some sense to me. Basically: (1) While being "in spec" [which is in itself a condition that is imprecise and subject to interpretation, as you noted] or listed by Saab is good, being "out of spec" or unlisted by Saab is not necessarily bad, and could even be better, given progress in technology.
And (2), viscosity is rated as XwY and in the context of synthetic oils, you want low X for starting and high Y for operation, especially for turbos, as you have noted. So it could be that with your choice of 15w40, you got the Y part "correct", but are suboptimal on X, and the proponents of X=5 or X=0 may in fact be "more correct". (This is not to suggest that 15w40 is a bad choice for LA, just possibly suboptimal.)
I seem to be seeing more 5w- and 0w- on the shelves (TX) these days. Perhaps that is a clue?
http://www.saabnet.com/tsn/bb/9000/index.html?bID=75979
Posts in this Thread:
- Type of Oil for 97 aero, GC, Tue, 5 Jun 2001 13:22:35
- Re: Type of Oil for 97 aero, Black Blur 9000, Wed, 6 Jun 2001 19:03:50
- MTL, again, Robert Davis, Thu, 7 Jun 2001 00:28:23
- Re: Type of Oil for 97 aero, GC, Wed, 6 Jun 2001 12:53:01
- Re: Type of Oil for 97 aero, Dick in Falls Church, Tue, 5 Jun 2001 22:22:30
- Re: Type of Oil for 97 aero, Robert Davis, Tue, 5 Jun 2001 21:27:21
- Re: Type of Oil for 97 aero, Ajay, Tue, 5 Jun 2001 14:53:08
- Re: Well any good oil will work, it is just an engine., aero guy, Tue, 5 Jun 2001 14:04:28
- Re: Type of Oil for 97 aero, SaxMaster 2112, Tue, 5 Jun 2001 13:51:45
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