If it was a matter of cost, I'd keep what was in it from the factory. 5 W 20 seems to be on the rise with auto makers but I still have a harder time finding it then 5 W 30. I do the three thousand mile measure just because it takes me about 4 months to get there.
What ever is on sale or with a mail in rebate, Usually Q-state or Penzoil form Menard's. Most auto part stores advertise a "oil change special" 5 quarts and a filter for about $13.00 but I can get a case of oil for that same price after I get the rebate check back. They have been getting them out really quick now, just make sure you use a different address on each rebate you send in.
2007 XLT Super Cab 2.3 5 Speed Auto 2 WD