I am helping a friend out with an oil leak on her truck. The oil leak is coming from the passenger side of the truck and it appears to be coming for the front of the motor and blowing back. There is oil on the air tube that is connected to the front of the passenger side exhaust manifold. There is also oil on the engine crossmemeber and on the starter. Her husband thought it might be a rear main seal leaking but it looks dry and I think most of it is coming from the front of the engine. I cleaned all of the oil up and ran it at work on the lift at idle. Could not get it to leak. Drove it home and there is oil everywhere again. Any help would be appreciated