pitsingerk
New Member
All right, I've been using Rotella 15-40 in my Fords all these years, should I continue to use this same oil in my 6.5L burban? Is there a better oil for the GM engine? Any addatives I should add when I change the oil, I always added a quart of Lucas to the Fords. Now the Ford held 14 quarts and from what I saw in the owners manual, the 6.5L takes 7? Any advice will be appreciated.