Don't bother, unless you're oversensitive of nature, what the hell could go wrong with the oil or filter, it's not a cheese with expiration date.
The only thing which isn't that good is running cold engines warm over short distances. Then you can gather some moisture in the oil, due to the moisture in the air, which appears as damp on the cold walls of the engine, when you start a cold engine it gets into the oil, and when you don't run the engine a long time, it doesn't vaporate out off the oil again.
BUT this is theory, it's correct, but in normal circumstances the oil used in the Vee is perfectly capable of handling the moisture, and also you got plenty enough oil inside the engine to cope with it.
But if you wanna spend the money, go ahead change the oil, change the filter, and when you'r on it do a cambeltchange at the same time, you know there are rodents who chew on timingbelts, when the car stands for long periods of time. That is the main reason I bought the Vee, those little bastards start searching in the front of the car for the timing belt. [smilie=bunny_4.gif] It takes them a while to realise the timing belt is in the rear. By that time I already drove the car again.
As an example on my modded 5 turbo's I owned in the past I changed oil every 4000 km, but there it was essential due to the gaz which got into the oil during a drive. (those have no timing belts)