Fwiw between myself and a few buddies here's some 2UZs, HG has never killed one or even been a problem. Not the 275k/500k you're looking for but I bet these have more heating and cooling cycles being shorter DD's. Some lifted w/tires, some grocery getters, some backup beaters.
Retired
Accident @ 240k 4R 2005
Rust (not gone but didn't want) 234k 4R 2005
Rust (awful) 261k 4R 2004
Still on the road
231k 4R 2006
196k 4R 2008
185k 100 2003
211k 4R 2006
175k 4R 2005
You can't stop age; rubber, rust, sealants, paint, nothing lasts forever.
Retired
Accident @ 240k 4R 2005
Rust (not gone but didn't want) 234k 4R 2005
Rust (awful) 261k 4R 2004
Still on the road
231k 4R 2006
196k 4R 2008
185k 100 2003
211k 4R 2006
175k 4R 2005
You can't stop age; rubber, rust, sealants, paint, nothing lasts forever.
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