As I was cruising through the manual for my Nissan, I was looking for information on the diff oil specs and happened to notice something I had overlooked before I believe.
In the spec that show recommended motor oil for ambient temperature ranges, it also lists 10W-40 as one of the oils that may be used, albeit in the same temp range as 10w30. I found this interesting (probably not so much to the experts here) because I wondered what would be the pros to switching to a heavier oil. The first things I thought of were a pro and a con:
Pro: quieter operation/ perhaps more film strength (?)
Con: decrease in fuel economy possibly
This also let me to wonder if I could get better use out of a 0W-40, say such as M1's? I do not know
What say you all about the use of a 40 weight oil for an egine that says it's ok, but prefers a 30 weight according to the manufacturer? I definitely would not use a 40 down here in the summer unless it was a OW-40.
In the spec that show recommended motor oil for ambient temperature ranges, it also lists 10W-40 as one of the oils that may be used, albeit in the same temp range as 10w30. I found this interesting (probably not so much to the experts here) because I wondered what would be the pros to switching to a heavier oil. The first things I thought of were a pro and a con:
Pro: quieter operation/ perhaps more film strength (?)
Con: decrease in fuel economy possibly
This also let me to wonder if I could get better use out of a 0W-40, say such as M1's? I do not know
What say you all about the use of a 40 weight oil for an egine that says it's ok, but prefers a 30 weight according to the manufacturer? I definitely would not use a 40 down here in the summer unless it was a OW-40.
