JBMLEXUS430

I own a 2003 LS430 and the first thing I did when I brought it home was change the oil myself. When I was in school I worked at the local lube shop for extra money. I could not believe the crap oil they put in cars and the filters are another story. It was really bad because the owner wanted to sell the shop, so supplies were at a minimum. We actually ran out of oil! For about a month the owner would just buy 12 cases of NAPA 10W30 each day and we would dump that in all the cars. You want castrol no problem go to the stock room and fill up a jug with 5 qts of Napa oil and call is Castrol. That's why I've changed my own oil ever since then. Plus the gentleman in a earlier post was right you can change your oil with Mobile 1 and use a factory filter for $30. If you go to your local lube shop for a Mobile 1 oil change they will change you $50 or $60 dollars. One question I recently purchased 4 factory oil filters for my LS. One thing I didn't think about was shelf life. Do I have to worry about the filter going bad(drying out) or the rubber seal going bad? I live in Denver and it's pretty dry out here.