I've got a 440 with a dual quad Edelbrock set-up to include the Edelbrock dual feed, pre-made fuel line. I've noticed the car smoking a little lately and today noticed oil residue seeping from the fitting where the main fuel line from the filter connects to the Edelbrock dual feed fuel line. I ran my finger around it and ended up with what amounted to about 2 drops of oil. What would be wrong to get oil in the fuel line?