So long as the oil you use meets or exceeds manufacturer specs our warranties will be fine. Granted, I'm not a dealer but am a former mechanic. Simply look at the back of the bottle and the SG rating. All motor oil is essentially the same (with the exception of synthetic & blends), so long as they have the same rating on the back. Paying $5 dollars a bottle doesn't mean you're getting a better oil, it just means you paid more it. There are only a couple of places in the world that even make motor oil. It's just an assembly line type of production. One company says I want a really cool looking bottle while another says I don't care what the bottle looks like. Again, as long as the oil has the manufacturer recommended rating, there's nothing to worry about.