I visited the Kendall website and they seem to have revamped their product line, perhaps as a result of now being part of ConocoPhillips. I noticed a 10-50 blend that would seem a good upgrade for my older BMWs. I've always used Castrol or Kendall 20w/50 in these cars but I am open to new ideas as oils improve. Should I give it a try? Any thoughts would be appreciated. Ken