your oil filter preference

[thstone]

Originally Posted by Perfectlap

What were the culprits and how many miles on each engine?

Also, the engine may not fail but as 911Monty points out, surely over time performance can be affected by smaller bits getting past the media.

204,000 miles - timing chain failure
136,000 miles - lifter failure
300 miles after rebuild of 136K mile engine - repeat lifter failure due to worn lifter carrier

146,000 miles and still running fine 996 when sold