Car dies at stops. Doesn't always start. Shutters. Gas in crankcase.

Hello, It sounds like you have an issue with ignition, or low compression in your engine. The fuel is in the crankcase because the injectors are spitting it into the engine while the engine does not start. Have the spark plugs been replaced on time, and have the coils been tested? Are the coils getting voltage? Is that voltage roughly the same? Let's get to the bottom of this, a 5 year old car should not have these issues.