I received a free 12 Jeep Liberty from a family member. The Jeep has been maintained well. The original motor was replaced a few years ago turns out there was a defect from the factory. The motor was replaced under warranty however I do not know the exact mileage of the motor so I’ve been using full synthetic high mileage oil. If I switch over to regular full synthetic would there be any issues?
What does your owner’s manual recommend for your engine? As long as you stick to that oil specification, you should be good to go.
I'm no mechanic
It would seem there is a fair bit of contention on this topic from my initial searches. There is a lot of marketing foobar in the results.
Luckily for you our 'ol pal scotty has done a video on this topic. https://www.youtube.com/watch?v=Hx7xUKdwqd8
