This was on a card that hung from the neck of the 5qt jug of Mobil 1 . On one side it shows a fuel guage ans states Save Fuel with Mobil 1. On the opposite side it has the question Why synthetica? It then goes on to say the following: Unlike conventional motor oil, synthetic oil is catalytically processed to remove impurities and allow Mobil 1 engineer our motor oil to our specifications: . Keeps your engine cleaner . Offer greater engine wear protection . Flow better in low temperatures . Increase protection at high temperatures . Help extend engine life This is pretty much what I saw on other jugs of name brand motor oil as they all seem to have a good , better , best , superior type upgrade for their products. Which has alwasy worked on a person like me who does not get oil on the same level as so many of you who are members here. I am that guy that marketers love as you put the word "Nano" or molecular any where on the bottle you already have me half way thru the purchase line. Yet Friday I was able to spend a little more time reading up on some the older post and so many talked about the greatness of conventional especially if you are not trying to extend your OCI to more than 5,000 miles which I am thinking will be my sweet spot for my 96 Ford Taurus which currently has Valvoline HM full synthetic 5W-30 (I know 5W-20 is now called for but I decided to go back to the 5W-30) and has only 62,000 miles on it. Many of the more knowledgeble posters opened my mind up that a good conventional or synthetic blend would still provide all the wear protection and heat protection that full sythetic would. My question is if I go to the 5,000 mile oci and use a good conventional oil would there be any benefit to using a full synthetic on every 5th OCI or so to make sure the engine is clean.