^ what he said. Are there any codes? a CEL (check engine light)? Also, more information will be helpfull. What does the car do right before it stalls? any other symptoms? are you 100% positive your getting both fuel and spark? I don't see leaking oil messing up the sensor. I've had an oil leak from almost every spot on my motor and it never threw out a sensor. Also, with my last 420a, my fuel tank was extremely rusted and would clogged the fuel filter stalling out the car. Car would have to sit for a bit before it'd start up again. However, the car would buck like crazy before stalling. Probably not your issue but there can be a couple different explanations for your issue...