engine died while driving, won't turn over.

[thstone]

• All three of my engine failures happened without any strange noises
• Two of the three failures the engine would not turn over after they stopped running
• Two of the three failures had a reduction in power for about 10-20 seconds before the engine stopped running
• Two of the three failures had a puddle of oil under the car
• None of the failures were due to IMS bearing failure (two failures caused by lifters and one by crank bearing)
• There are ~30 ways that a Boxster engine can fail
• 178,000 miles is a lot of miles

Like Retroman, I hope that I'm completely wrong, but you can see where I'm going with this....