Hi everyone just want to know what the best engine oil to run in my 300 tdi i live in cairns and regularly travel out west on long trips, i am currantly using fuchs 10w 40 which is what i run in my Mack which has a high detergent content,can i use mobil 1 in the 300tdi money is no problem i want to run the best possible oil as i live in a very hot and humid enviroment....thanks in advance Wes..