Did my first oil change at 2200 miles I hate to drive too much on the first oil. First I noticed how much it quieted the motor. maybe I should have changed it sooner??. I had them put in synthetic blend Quaker state. I have had good luck with this in other cars I own. Also I had them check the rear differential oil as some have had issues with it. It was full and looked fine. I have had no problems with my truck except the low tire warning on a very cold day.