K&N Filter ?

[ZWILD1]

I ran a K&N in my first 91 Z. The car I bought has one in it. I did a filter clean and recharge using the K&N products. Has anyone had issues with the K&N filter oil cause problems with sensors? I did the filter service several months before Carlisle and it hasn't really been driven a lot of miles. But I now have both 02 sensors showing rich. I remember from my first car seeing the red K&N filter oil making it's way up the intake hose and into the air horn and probably into the intake.


When I pulled the assembly to do the filter service it had some oil in the hose and the air horn. I was reading on another car forum where a guy claimed his mechanic said his Mercedes needed lots of work from the filter oil causing problems like issues with the MAS and then other said it was a problem. So I thought I would ask ZR1 guys if any problems from the oil.