Ah the age old question. With Dino oil I changed every 3K to 3.5K. With Synethic I will be changing every 5K-6K.cornick said:How often are you suppose to change it with regular oil? I thought it was suppose to be 3000 miles, but on the slip I got from Nissan it said 3750.
Synthetic in older engines doesn't cause leaks. It exposes microscopic leaks that dino oil hides because it doesn't get in the nooks and crannies as well as synthetic does.woah, you switched @ 101K miles and it stopped leaking?
I read that switching to syn oil may create leaks???
is 30K too late?
Got my X less than a month ago, I'm sure Nissan is still using dino oil for 30k svc that was done for certified pre sale?