The Saturn 1.9 SOHC and DOHC can get fuel/oil dilution problems because the ECTS (Engine coolant temp sensor) fails often, and causes the ECU to inject as much fuel as it would when starting it up on a very cold morning.
Good thing new ones only cost about $20 and require very little time to install.
I remember seeing a friend using BG oil system flush on a car where the oil was in for an unknown period of time. Chunks of stuff were coming out along with the oil.
