i bought my abandoned 79 Sprint Veloce about a year ago, and replaced the fuel pump to get it running again. i got a standard fuel pump from autozone after doing extensive research and it has been working quite well. however, my problem is i am getting a fuel smell in my oil, and my oil gets quite thin between changes. even after replacing my spica pump with a known-good one, im having this issue again. based on my "limited" knowledge of the spica system, the system is required to have 12-15 psi of fuel going into the (spica) pump. but as with any fuel system, the pump has a return fitting that allows excess fuel to leave the pump and go back to the tank. there is also a small fitting on the "in" line that limits fuel pressure as well. so is it really possible to over-feed the system with fuel, and then is it possible for that excess amount of fuel to somehow bleed into the oil system? or do i just simply have a bad spica pump?