I was getting oil in my intake and was told I could be experiencing some blow-by and it was suggested that I plug the pcv, the tube on the t/b, the breather tube, and the vacuum tube. So I did this, and put a filter type breather cap on the oil fill tube. I noticed that there is a lot of oil on the filter. Not oil residue, but oil. What could cause this and does this point to bad rings? Car smokes some and there is oil on the #5 plug when I change it. The motor is stock, and is a 1990 with 130K on the clock. Any opinions? Thanks!