I have used the Advanced Auto brand for probably 12 years and have several hard driven F-150's with 300k on them and a Silverado 4.3 with over 400k on it. I cold go on and on but you get the point.
I really don't think there is that huge of a difference as long as it is maintained properly. I know that I will never use Quaker State sludge mush again. Bought a truck with 60k on it and the guy swore by Quaker State and changed the oil every 2,500 miles. It ended up having an intake leak so we pulled it to put new gaskets on it and there was a 1/2 inch of Quaker Sludge in the valley.
