Freeze Up Kit???

[alano]

Has anyone ever heard of a 'Freeze Up Kit' for their X5?

I have a 2004 4.8is, all winter long it randomly won't start, it chokes a bit then just keeps cranking. If I leave it for about 4 hours, it starts up perfectly. This happens about once a week. It's not related to temperature as it always seems to happen when stored in a heated garage.
I've taken it to the dealer a few times and they've never been able to find the problem or even replicate it. So this time there telling me I need to install a Freeze Up kit. It's something to do with the PCV valve on the 4.8 engine being located in a spot that doesn't get enough heat from the engine thus can freeze up in really cold climates causing oil problems and condensation. The cost will be $2500 to $3000 and is not covered by warranty.

Obviously, I complained and they told me that the 4.8is is not a good engine for very cold climates....Nice!

Any thoughts? I'm not convinced this is the issue, I think it may be due to condensation though, my wife drives it (very gently) to and from work, heated garage to heated garage, with -25c weather in the middle. What led the dealer to believe it's this freeze up issue is they noticed the oil was a bit 'milky'.