Costs?
If you run a Toyota and want to use 5w30, Toyota Genuine Motor Oil purchased online from local Toyota dealer for in store pickup is ~$24 for a 6 quart case (Southeast usa region). And you can stock up on it for less than $20/case during a 25% off sale which this dealer group region runs multiple times per year. So a little over $3 per quart. I don't think I've found a consistently better deal / bang for buck.