1999-2009 [Subscribe to Daily Digest] |
0W40 is the only group IV oil and as such has much better resistance to sludging. All other Mobil 1 oils are unknown mix of group III and group IV (and mostly group III). Both Saab and Mobil 1 specifically say to use 0w40 in 9-5s.
'00 9-5 Gary Fisher, 225k with 10k oil changes of 0w40.
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