Originally Posted By: Robbie
I just recently purchase a 2006 Nissan Frontier 4.0 v-6, 130000 miles. all the info. on the truck is that it has all ways had conventional oil., is it safe to switch to synthetic oil.
Yup! perfectly safe, no matter the marketing, its all just oil. Nothing more, nothing less. Your statement is the proof.
You bought a great running truck with 130000 miles on it using conventional oil. There is no magical formula to overcome physical wear using oil with the same API ratings, no matter how its marketed.