I just got my s4 chipped and do autocross every once in a while. I live in san diego where cold temperatures are hard to come by. About twice a year I commute to the bay area which is about a 9 hour drive. I was wondering what oil would be good. Would the 15W-50 or 10W-40 work from motul or would that be too extreme?

 

15-50 is to heavy. Use the 10-40, or try & get the 5-40.

 

0-w40 Mobil 1. or if you really want good oil get elf, but i've never found it in stores, only online.