Wal-Mart's ok, just have to watch them. Is better than the dealer with the same kids doing the work:
"Diesel Oil Change & DEF Fluid Top Off
Expires: September 9, 2016
3.0L Eco-Diesel Engines - $129.95 - Includes up to 8qts Pennzoil full synthetic oil, Oil filter and up to 1 gallon of Mopar diesel exhaust fluid (DEF)
6.7L Cummins Diesel Engines - $149.95 - Includes up to 12qts of Mopar MaxPro Oil, Oil filter and up to 1 gallon of Mopar diesel exhaust fluid (DEF)
Coupon must be presented at time of visit, offers cannot be combined. Some discounts may require a minimum purchase and have a maximum discount amount. Oil changes include, but are not limited to, 5 quarts of oil (whichever type is specified in the offer), new oil filter (if applicable), and a multi-point inspection. Taxes, and waste fees extra. See service adviser for details."