Ok I just got my oil changed and used conventional oil, and I read that Nissan says not to use synthetic but some people have been using it. Does it really hard the engine or should i switch to sythentic? I'm currently at 60k miles what do you guys recommend?

 

we recomend you read in the eng area on the site. https://my350z.com/forum/engine-and-drivetrain-50/

 

Moved to proper forum

Go to the top of this forum and click on "Search this forum" then enter synthetic as the search term. You'll find hundreds of not thousands of threads on the subject.