7.3 ford engine have sleeve

What year(s) did Saab have the sludge problem w/it's engines and what was the cause of this?

I hear so much about what engine is the best out of the three Saab has/had offered, being the 2.3 the oldest of the bunch I guess. Everyone seems to use the synthetic oil instead of conventional.Reason? Are the oil passages that narrow that you need something


A bunch of engines have sludge problems but it is not only Saab. According to the Center for Auto Safety all of the following engines have the sludge problem from Saab:

1998-2003 SaabH engine B205/B235I4
1998-2003 Saab 9-5 B235 2.3

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