I change my own oil and filter on my 2009 SRT. I use Mobil 1 0W-40 full synthetic and an SRT oil filter. I enjoy working on my car and want to use the best products and make sure that it is done right. I take my two grocery-getter cars/SUVs to Valvoline Instant Oil Change. I use a Groupon discount and get the oil changed quickly and cheaply for only $24.99. This is about what I would pay if I changed it myself. The only annoyance is that they try to sell you things like wipers, air filters and cabin filters. I just say "not at this time."