gets dirty period. Any effort to extend oil change
intervals is not in the best interest of any engine
. Storys of long life (mileage) and 20,000 mile oil
changes are unfortunatly the same with dino oil. Except no one braggs about it, because it is the NORM. As a mechanic
with many mechanic
friends It is mainly non-mechanical people who get vastly sold on the concept
of synthetics. Its advertising that convinces people it will help. And because they dont understand anything under the hood
, putting fancy expensive oil in seems like a way to baby your car. If all you folks are using it than all the myths, lies, advertising,and misinformation seem to be working well.