[wayne robson]

As wildbilly32 says,brings up a point,cylinder scoring in cold temps, can you confirm back east or cold areas ,do Porsche owners change oil from say 10--50 mobil i,or similar to a 10--40 or 30, i think this is a must , changing oil grade from summer to fall, where i was born south NewZealand,did this every year with all my classic cars, but here in Australia where i live now use 10--40 all year round.