Hi, What mileage would be considered to high to purchase a vt,and what sort of things go wrong with them. cheers Terry
250,000km is high. The V6 is an ecotec, which is generally on borrowed time after 250-300,000km if not looked after well.
If it's a series 1, and a V8 (304), then it's probably going to outlive you if looked after. If it's a series 2, and a V8 (LS1) then they have issues of their own back then, related to oil rings and piston slap. Some are dodgy, some are good, it's luck of the draw really.
I would suggest looking for a VX either wayThey look a little nicer, and have some of the VT bugs worked out of them.
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The 1972 HQ Kingswood
The 1989 VN Turbo Rally Project
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you could always get another motor for $300
Its more just the other things on the car that wears out