Check out this oil selector. You input the vehicle, year, miles, zip code (so they can gauge your temperature regime), use info, and then it makes an oil recommendation, giving the reason why. At the bottom are listed all the Valvoline brands and you can click any of them for the reason they did not recommend that brand. There is a viscosity recommendation, but when I did it, that came up blank. Anyway, thought some folks might have a little fun playing around with it (not trying to push Valvoline, though that is about all I use).