Originally Posted by tiger862
Any that meets spec of my vehicle.
Same here, as long as it's a major name brand, and it's the lowest priced. I think I've used every major brand of conventional oil over the years, and I've never experienced an oil related problem in any of my cars or trucks. I've always used reputable brand filters specced for my motors, and paid attention to my drain intervals.
Lately or cost effectiveness, I've been buying a major brand, Phillips 66/Kendall from local distributors. Phillips typically doesn't pay a bunch for advertising their oils, so they can be bought at a price lower than Walmart's price.
In my humble opinion, and by looking at the UOAs here, there's not a huge difference in one major brand to another in conventional oils. I'm guessing it's the same for synthetics.