My grandfather-in-law poured the wrong oil in his 2005 Nissan Altima last week (QR25DE with 290k miles) and didn't realize it until this evening when he went to change the oil in his Dodge which the 5w-20 was meant for. He's already put about 100 miles on the M1 5w-20 in the Nissan. He's concerned about it a little, but is wondering if it'll be fine for a normal oil interval and can go back to 5w-30.
Do you guys think it'll be fine on the 5w-20 for one oil change or should he dump it? He's 78 years old and drives like it.
Do you guys think it'll be fine on the 5w-20 for one oil change or should he dump it? He's 78 years old and drives like it.