I was wondering if there is a known issue that would explain why my oil smells a bit gassy. My car is a 1993 Audi 100CS with the V6.

 

hmm, it shouldnt, there is no place on the engine where fuel can leak into the engine.
you smell something else.

reason: Injectors + electric fuel pump.

 

Injectors are probably leaking and are not holding pressure after shutdown. Fuel drips, seeps past the valve, past the rings, down the cylinder walls and into the oil pan. Do you have a hard starting or other running problems?

 

far fetched, but posible.

 

No, the car runs very smooth actually. There is a slight oil leak near the upper block/intake manifold. I can peer down into the depths and see a bit of oil slick. Also, there appears to be a inspection plug missing near my torque converter, passenger side. At least I hope its a missing plug, otherwise there is a gaping hole in my TC housing. Anyone give me a yeah or nay on a inspection hole plug? I've had this car for a couple of months now, fixed a series of CEL by patching up a LOT of rotten vacuum lines. Other than the 5 car pile up I was in the 5 days after buying it, its been great (fog is not conducive to two lanes of opposing traffic and the crackheads that speed in it) . Anyone have front driver side components for this car. Heheheh I've been doing al ot of shopping, 75 bucks for a foglight sure seems pricey! Thanks for the replies.

 

Not so far fetched, kakarot! That is why I asked if there is a running problem, leaking that much fuel would cause other problems but this is the only way you are going to get fuel mixing with oil. Since fuel doesn't have surface tension like water it will seep very easily past the valves and rings.