Been using Liqui Moly since last 4 changes when a mechanic got emotional explaining how Mobil 1 is good, but if you are going such a long trip, oh man got for Liqui Moly, the best of the best, his reaction was almost orgasmic.
And I have loved the performance, lower noise, possibly good fuel economy, a 30 mpg+ on a 7k km trip last year.
For anyone who doesn't mind spending an extra buck, try Liqui Moly.