So I suspect I already know what is wrong but I wanted to double check with you pro's out there. I checked my plugs today (for the hell of it) and found only 1 had a noticable amount of oil on it. My car's engine is a mostly stock (only changes I've made / I know about are plugs and an Edelbrock 1406 carb) 305. What do you think? Gaskets?

 

How many miles on it? Just a " noticeable " amount..?.. as in a drop or two, more//less?

Check the PCV. Valve seals for that cylinder.

Maybe premature, but can you do a leak-down test?

 

Where, exactly on the plug did you find the oil?

Jake

 

The engine has about 240k KM's on it but it was rebuilt at about 180k. By "noticable" amount, I mean enough to cover the tip of the plug entirely. The thing I found weird was there was only oil on that 1 plug, the others were clean.

 

Valve steam seals? How much oil are you burning?

 

My first thought, too, if it's on the porcelain.

Jake