Fords I've owned:
'65 Mustang 2+2, 289 2V 3-speed (actually Dad's)- 165,000 miles when we took it apart. Drove it the day before after sitting for 10 years (filled the carb. bowls and she fired right up). We're currently (and slowly) restoring her.
'69 Torino GT, 351W 4V/FMX - 184,000 miles when i took it apart (was still running, just starting to smoke). I had put the last 35,000 on it and only had a carb. problem.
'85 Mustang GT, 302 4V/5-speed - 150,000 miles when I sold it. Main bearing spun at 77,000 (PO apparently never changed the oil

). Rebuilt and never had another engine problem.
'78 F-250, 351M 2V/auto - XXX,000 miles (beater truck). Replaced timing chain and carb.
'84 Thunderbird, 302/auto - 132,000 when sold. No mechanical engine trouble. Electrics are a different story.

'95 Crown Vic Police Interceptor, 4.6/auto - 125,000 when sold. No problems. Wonderful car. Wish I still had it.
'00 F-150 4X4, 5.4/auto - 57,000 so far. No problems.
I've owned 1 Chevy ('85 1/2 ton) and it was fairly reliable. It kept fouling the #8 plug, but had no guts even when running right. Rusted badly. Everything just had a "cheap" quality to it. I hated that truck.
We have 10 Chevy vans here at work. All of the newer ones ('96 1/2 and later) are junk: Very thin metal can't stand up to the slightest abuse; cheap plastic door handles, switches, light housings, etc. are always breaking or falling off; plastic intake manifolds leak; brakes fail prematurely... The older vans were built for work - can't complain about those. However we just retired the last one (320,000 miles!) The record so far is the one Ford we used to have though. It had 369,000 miles on it when we donated it to a charity (3 years ago - don't know if it's still in use). The only problem it ever had was having a fuel pump go bad. Twice.
As an aside: We haven't had a single oil-related problem since we switched to Mobil 1 10 years ago. And we change our oil every 10,000 miles.
