Nope, poor head design when Toyota attempted to extract more mpg from
their 3.0L V6. Created hot/cold spots and poor maintenance made the
problem obvious. A new valve cover was followed by a better head
design. Fixed years ago.
By the way, I have 171K trouble-free miles on one of the sludge-prone
3.0L V6s. Still delivering better than EPA mpg.
5000 is conservative enough that should she forget an oil change the
car will still be fine. Can't say the same about Honda's 10,000
interval. Keep in mind that most people won't even open the hood
between routine oil changes.
TeGGeR has an eye-opener in this 2001 Toyota V6 with less than 9000 miles
(probably without an oil change):
Definitely a "come to Jesus" event.
Would be interesting to know how many months the car had gone without
an oil change. If this happened after 3 months I'd have a different
opinion than if it happened after 3 years.
If you search around you can find other equally well documented sludged
engines from just about every manufacturer.
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