As a Nissan tech I once saw an Altima that went 40k without an oil change. The oil turned into a powder with a liquid-looking sheen on it until you crumbled it. We could definitely tell which customers changed their oil regularly and which didn't. The Altimas had a oil gallery seal behind the front cover that would leak if you didn't change your oil regularly. Once you get more than 5000 miles on your oil, the oil seals begin to harden. But also, that was in the late '90s, and the rubber they're using now is significantly better, higher silicone content, etc.
I'm not a fan of Pennzoil nor Quaker State. I have a general rule in my head - whichever company in an industry advertises the hardest, is probably the crappiest. Pennzoil and Quaker State are reputed to be completely recycled oil, and don't last as long. A dirt track racer I knew swore by Pennzoil, because he changed the oil every race.
Fram filters are hot garbage, unless you buy their "premium" filter at 4x the cost of a Wix filter, and Wix/Mann often makes the filters that Fram slaps their premium label on. I always ask for Wix. On a side note, Mann acquired Wix a little while back, so if the name changes, it's the same company.
I go about 5000 miles between oil changes, I use Valvoline 5w30 (which is a decent compromise between quality oil and cost), and a Wix filter. I don't pay any extra for "high mileage" or any other advertising slogan.
