I meant net savings over time after changing oil more often with dino. I'm paying ~$4.5/qt for mobil 1(when I don't get it on sale) in the 5qt jug. I bought name brand dino for my '73 and it was ~$2.5/qt in a 5qt jug. I'm looking at ~$10-12 savings which would be erased since I'd have one extra oil change per year on dino.
That's true from a 'good enough' point of view.