I changed the oil the other day. I had been using 15-w40 rotella and changed to 15-w40 delvac. I noticed oil pressure at idle to sit lower with the delvac.

I had previously changed th filter and was supplied with a flat rubber seal for the filter housing. I had trouble getting it back on and have had an oil pancake under the car for a while. I could tell it was leaking at the filter housing. The filter I bought the other day had two seals, the flat and an O-ring. I decided to try the O-ring. Not only was it easy to get back together but I have no leaks.

Anybody had this experience?