There is no way that someone can feel the difference on the smoothness.
I agree 100%...IMPOSSIBLE to tell. It's called the placebo effect. You think it's going to run better....therefor it does run better (at least you THINK it runs better).
There is no way that someone can feel the difference on the smoothness.
I run Mobil 1 EP with Mobil 1 EP filter for for 12 mo which amounts to 10-15k mi depending on my underway schedule. The 2UZ-FE can go more with ease when running this combo from the UOA that are out there.
I'm almost at 60K miles with Mobil 1 and haven't had any issues
That 60k on ONE oil change??? I surely hope not.
you are probably referring to the Synthetic oil Seepage in older high millage engine seals. Correct me if I am wrong but I think that has been addressed in most modern synthetic oils.
I don't think of synthetic as a must but rather as an insurance. I use it to extend the life of my oil and to help protect in the event I should ever need my oil to hold up under extreme conditions.