Question about 3400 gasket/cooalant leak etc....

I'm buying a 2003 Buick Rendezvous and reports of this problem are the only thing that worries me.
Is there something I can other than keeping a close eye on oil/coolant
levels?
Should I have my Mech power flush out Dexcool and put in conventional coolant (green stuff)?
Also, a side question.
Can I use sythetic (specifically MOBIL 1) engine and Tranny fluid on the 3400? I coming from a Ford, which has been nice to me but I like the Buick as my next car.
Thanks all.
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It (especially the AWD) has the worst accleration and fuel economy of all the SUVs out there. I have a 2002 to get rid of as soon as possible.

Doesn't matter that you keep a close eys or not, the gasket is going to leak no matter what.

No, that will void your warranty all together.

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Tell the dealer you will buy with a 100,000 mile warranty on gasket....

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The 2003 should have the new style gaskets in it and they are supposed to alleviate the problem.
>It (especially the AWD) has the worst fuel

Not really, that honor goes to the Land Rover.

Yes, your chances of problems are greatly reduced if you either: flush the dexcool out and replace it with regular anti-freeze or flush the system and replace the Dexcool religiously every 5 years or 50,000 miles (whichever comes first). A word of caution though, if you install ethelene glycol antifreeze (the green stuff), it may void your warranty - talk to your dealer before doing it.
****************************************** I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it. ~ Thomas Jefferson ~
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