First change or did you wait to add it? I usually change the oil at 2500, then at 5000 and every 5K after. I have the dealership do every service with their bulk blend and have had zero issue. If the oil plug is stripped or cam phaser rattles or anything. I just say “check your records, you guys are the only ones who have touched this thing”.I get full synthetic, holds up better in the 3.5, I ran blend in my 5.0, but decided after some research to go full synthetic oil on the 3.5, honestly not much difference in price.
Nice, glad someone thinks like me. I might try it on this truck.I did it at 5k and I go through the dealer as well, it's only $7 more for full synthetic at my dealer. I get it changed every 5k, along with tire rotation. Because I did this with my other truck and they had the records for the service they gave me an extra 5k for trade.