I have 3 different vehicles and frankly don't keep track of what oil goes where. I use whatever brand name is on sale at the time and that usually varies between Castrol GTX, Pennzoil and Valvoline. I change it at 3000 or less. When I add oil to the vehicles, I add whatever I have at the time, so I may add Pennzoil to the vehicle with Valvoline.
Now, I am thinking something else - I want to make my own custom blend of synth. Maybe half Mobil 1 and half Pennzoil? I understand that it is not a good idea to mix brands, but given that synth. does not have detergents, would it get any benefits?
[ October 18, 2003, 08:15 PM: Message edited by: pacem ]