This has happenned a couple of times now.

I am driving along and the engine cuts out. Tachometer drops to zero, oil pressure light comes on no other lights. Two seconds later engine just comes right back on.

The other scenario is the same as above but engine does not come back on. I drop to neutral and try to restart, does not turn over. I pull over, put car in park, turn completely off, then restart, everything OK.

2.5l V6
175,000 miles

Any suggestions?