hello i will be going home on post deployment leave i bought a new truck and it is at home now in wisconsin. it is a 2005 6.0 powerstroke. 4x4. i will be driving the truck in the cold weather for about 2 weeks then taking it across country to california. back to where i am stationed at. i am just wanting recomendations to should i change the oil as soon as i get home in the first couple of days? or righ before i take the road trip.? also if you do recomend me changin it what weight and brand and type should you recomend me changin into it? it has 95000 miles on it and do not knwo what oil or filter are on it now. also any other sugestions before taking my truck across country? is it safe to take out the egr valve and spray it with break cleaner and make it all clean and shinny to make sure it doesnt get messed up on the drive.