Re: But have you changed the oil? - Saabnet.com Bulletin Board
Yes, I changed it this afternoon, and the filter, too (Fram). My theory is that with a worn engine (and every one of my cars has been an older used vehicle), you're a little better off with slightly higher viscosity. The cold viscosity of 10W30 and 10W40 is supposed to be the same, so I'm not sure what advantage the -30 would have considering my driving habits. Anyway, in over 30 years of using GTX 10W40 in Saab 99 and 900, I haven't needed any valve, ring, bearing, piston, etc. work.
posted by 104.162.12...
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