The Amsoil filter that I'm using is the same size as stock. Plus it'd have to be one BIG filter to swallow up a full extra quart, plus of oil....

Wondering if the online specs (capacity) are wrong. 4.2 / 4.3 VS 5.3 or 5 1/2?

Anyone else find that they need 5 1/2 qts of oil with the oil/filter change?