I know that the acadia is suppose to have 5w30 oil in it because it say so in the manual and on the filler cap. does it make a difference if 10w30 is put in instead. i ask because i just had my oil changed and noticed when i got home that my paperwork says 10w30 :bangheadn it. i had the oil changed at the dealer where i bought the truck because they have free lifetime oil changes, i dont think the weight will make too much of a difference----opinions??? ???