Maybe this is too easy of an answer.
1. I use what the owners manual says regarding the viscosity.
2. I always use a synthetic oil.
3. I use the oil change monitor but will change oil earlier if it gets a bit too dirty. I often
change at 6,000 to 7,000 miles as indicated by the monitor.
4. I make sure I do a change after the winter, usually in March. I usually do another one in the
fall, usually September.
4. I always change the oil filter at the time of the oil change.
5. I buy whatever synthetic oil is on sale, usually Mobil 1, Pennzoil, Quaker State or Valvoline
6. The latest API rating for gas engines is SN plus there is the Dexos designation for GM which I am now following for my GM. All these oils meet API SN.
Much of this Forum is intended to let the wanna-be chemists to tells us about their special concoctions, and let them; its a lot of good fun.
Anyway, what are my results? All of my vehicles had over 150,000 miles on them when I sold them. The engines still ran perfectly. I currently have a 2008 Suburban with a 6.0 liter gas engine with 150,000 miles and I intend to run it to at least 200,000 miles or more God willing.
Now for all the criticism from the Chemists. Bring it on.
SF
1. I use what the owners manual says regarding the viscosity.
2. I always use a synthetic oil.
3. I use the oil change monitor but will change oil earlier if it gets a bit too dirty. I often
change at 6,000 to 7,000 miles as indicated by the monitor.
4. I make sure I do a change after the winter, usually in March. I usually do another one in the
fall, usually September.
4. I always change the oil filter at the time of the oil change.
5. I buy whatever synthetic oil is on sale, usually Mobil 1, Pennzoil, Quaker State or Valvoline
6. The latest API rating for gas engines is SN plus there is the Dexos designation for GM which I am now following for my GM. All these oils meet API SN.
Much of this Forum is intended to let the wanna-be chemists to tells us about their special concoctions, and let them; its a lot of good fun.
Anyway, what are my results? All of my vehicles had over 150,000 miles on them when I sold them. The engines still ran perfectly. I currently have a 2008 Suburban with a 6.0 liter gas engine with 150,000 miles and I intend to run it to at least 200,000 miles or more God willing.
Now for all the criticism from the Chemists. Bring it on.
SF