Hi. I want to change the oil on my 2015 RAM ecodiesel. The only local filters available are Wicks products. I strongly dislike the local dealer who stocks MOPAR. They never get back to me whenever I call them. Rat *******s! Should I order online or use a Wicks? Not sure if that messes with the warranty. My truck is a 2015 and only has 6600 miles on it. I bought it in July new. I want to get rid of the light stock oil and put Rotella T6 Synthetic in it. Thanks, Herb