THere is a loud rattling sound coming from under the engine. it is making the oil pan rattle. there is now a steady drip of about one second apart that consists of gas and oil mixed together underneath the passenger side of the truck. what could this be? i was also in a front end collision, the front clip was pushed up slightly on the passenger side. it wasnt leaking after the accident. only after it sat for about 4 months after. any help is appreciated.

 

Assuming that you have a CPI motor, the fuel/oil mixture could mean that you have a failed FPR (fuel pressure regulator). Much has been discussed about this problem on the forum so search up! Terms like "fuel+pressure+regulator" should get you some decent threads.