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I ran my 2002 Infiniti q45 TO 270,000 MILES and ecomodded for 200k of it.
Several thoughts:
1. I drove 'easier' than I would have normally, thus reducing the 'mnormal' wear and tear. At 200k miles and 9 yrs old, people who rode w/ me the first time couldn't believe how many miles I had.
2. ran a full upper grille block. ran taller tires(reducing rpms) and ran lighter oil. also had 2 small fans on a separate switch.
While op's brother makes some logical hypothetical points, the reality does not follow.
as a note: ran the original fan belt till around 200k+ and NEVER changed any hoses in 270k miles. But I ran a scangauge and always kept an eye on the coolant temp.
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