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			Wishful thinking...you're never going to be completely safe. You can only change the odds of suffering a catastrophic failure.  
 By the time ferrous metal shows up in filters or drain plugs, damage is taking place already. Maybe a major rebuild fixes things; maybe not.
 
 As others have said, change the oil regularly and change the IMS when replacing the clutch. This is probably the most cost effective approach.
 
				__________________'87 951
 '01S 986 (Sold after 16 years ownership)
 '78 924 (carburated; sold when moving to CA)
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