Flush with cheap oil but dont just run it to temp - take it for a few rides and then when its nice and warm dump the "cheap" oil n replace with whatever brand of good quality oil you like. Run it around on the new stuff with a new filter and pull it before you go to Africa to see if there are any new waves (hopefully not).
My $2c. The mesh screen filters are good for trips as they dont inhibit oil flow if the water pomp seal happens to die..
For those who sit at home and dream-let them...Meoni