I am currently running Mobils synthetic blend for high milge engines, i wanna go full synthetic but the guys at outo zone say that my car has to many miles on it, i dont have any oil leaks, so i dont see what the problem is. i have 140K on it, and the switch to part synthecitc didnt cuase any leaks, so can i?

Also i guess once you go synthetic you cant go back? is that true, and is there also any prep work that needs to be done before switching to syntetic?

 

If your motor is not burning oil and has no leaks there is NO risk in running synthetic.

You CAN switch back and forth, mix or do whatever you want with synthetic and regular dinosaur oil. Think about it you are presently running a blend of the two!

Switch to synthetic and you should get better mileage and safely increase your oil change interval.


noel