The oil pressure has been running higher than normal, and sometimes I smell a whiff of oil when it's running. What is going on? I just wonder if it is the quart of oil I put in it that my husband got, it said 5w 30w however after I put it in, I noticed it said for high mileage cars. I hope that did not do something as I have never used any oil that said high mileage. Yikes.