It's not Just Oil
It's not just oil !!! It's the life blood of your engine. If you look to save money here by buying a cheaper product because it says it will work your seriously messing up. When it comes to mix oil you definateley get whet you pay for. I personally believe in full synthetic and people never mix your brands ! If you find a product that works well stick to it and don't settle for somthing thst some guy at the track says will work or is better.
I never mix brands I try to stay with one oil the entire time I'm using it. And if I switch for what ever reason I never mix 2 oils to make a tank. All oils are not the same and they may be manufactured out of different solutions that will not mix together.