I just changed my oil and used castrol syntec 5w30 and a mobil 1 oil filter. Before I always used a conventional oil Pennzoil 5w30 it had a purealator oil filter on it. When I started it up the oil pressure was a little higher than it has ever been , not bad but higher.What would be the reason for this , filter , oil ? is this a concern ? Its a 1997 sebring with 198000 miles on it .Thanks Darris