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My '06 Carrera S is a daily driver, has 91,000 miles and still running tops. I've replaced the water pump at 71,000 miles and while doing that the serpentine belt. But other than that no problems. If you get an "S" I do recommend spending the money and having the factory 3rd radiator installed, as these cars do have a weakness in oiling and cooling the cylinders nearest the front of the car and has been known that they can score the cylinders or worse case scenario is a "D" chunk cylinder liner failure where a piece of the cylinder wall fails and it's shaped like a "D" ive seen it once in a low mileage car. So some things to look out for... Smoke on start up. Doesn't mean its developed the issue but it can be that or a Air Oil Separator. If the AOS is good then its probably got a scored cylinder liner. So its very important to have a compression check done and a bore scope, mainly on the 4 cylinders closest to the front of the car as those are the ones usually to develop a problem. If those two tests turn out good, then don't be afraid to buy it, but I would add the 3rd radiator which is actually not as expensive as you think it should be, under $300 if I remember correctly. The other thing to do is to run an expensive oil like Millers Nano drive or add a tungsten disulphide additive like AP Nano's Nano Lub RC-X , both of these products have nano fullerenes of tungsten disulphide which is the slickest substance known to date. It will reduce friction and heat in a motor and will create a nano layer of tungsten disulphide on any surfaces that have high heat and friction. Its not snake oil. Race teams have been secretly using it for years and its extended their engine rebuilds by up to 300%. Ive been using it since I bought my 997 and my car burns almost zero oil and has zero smoke on start, compression is still factory spec and I have no cylinder wall scoring. Also, get a '06 or later as they have bigger IMS bearings and I have yet to hear of one failing like they can and have in the '05. Dont be afraid of a high mileage car either. I can almost guarantee it will be more problem free than a car that hasn't been driven a lot especially if you plan on driving it daily. If you buy a low mileage car and start driving it daily I can almost guarantee it will develop some quirks within the first few months, but once those are solved and you continue to drive it, it should be fine. These cars do much better when driven often.
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