[Sagara09]

I took a spark plug out and noticed there was a thin brown liquid. It didn't have a smell and it felt a lot like grease. What the heck is this??

 

[280zx!!!]

its sounds a lot like antifreeze and oil mix....maybe a leaky headgasket?

 

[Sagara09]

Maybe. I really dont know. The engine ran perfect in the car before this one.

 

[280zx!!!]

thats the only thing that i can think of....id check the antifreeze and see if u have any oil in it(let it sit for a while and then pull the drainplug just for a second and see if there is any oil in it) its an easy way to tell

 

[Sagara09]

I dont think thats it. I just changed the oil .

 

[Douchebag McGilicutty]

What kind of car? Could be oil leaking from the valve cover mixing with water getting in there?