I've read some threads on here and everyone seems to be using Mobil1 0w40 for DD...
Im wondering what you trackers/auto-x'ers are running...
Which would you choose Mobil1 or Royal Purple 0w40 or 10w40 FOR TRACK/AUTOX days??
**Wouldnt the 0w40 be too thin for track days??
btw I have oil cooler
Thanks