My sister bought her Altima about a year ago with 85k if I remember correctly and I have been changing oil in it. The 2.5 has 0w20 recommended and what I put in it but today she went to 2 different parts stores (O'Reilly and AutoZone). AutoZone told her it took 5w30 or motor would blow so she left. Got to O'Reilly's and parts lady stated oil has to be ordered as it takes a special 5w30 so motor won't blow and she only had 1 quart at 16.99 on sale if she purchased all 5 quarts today with oil filter totaling 116 plus tax. She called me with question of why is oil change so expensive and would I do it when oil comes in? I told her to leave so no sale at either place. I look at manual and it states 0w20 with a conventional 5w30 if 0w20 not desired and no mention of 5w20. I am staying with 20 grade therefore 5w20 which is a blend.Just thought how many people are being misinformed daily. 5k OCI