[SVXer95]

In my opinion those high mileage oils are a marketing gimmick. I used regular Pennzoil 10w30 for a long time, recently changed to mobil one.

There is some discussion of synthetic use and boxers in the 'SVX Drip' thread. It looks like that is a myth. Well, sort of a myth. Apparently there was a bit of trouble with synthetics in air-cooled airplane flat motors.

On the other hand, Porsche uses synthetics (Mobil1) in their motors from the factory.

I say use synthetic. I like Mobil1, but there are a bunch of other great ones out there. Some peiople swear by Amsoil, Royal Purple, etc.