Scania r440

I have a 2013 SCR 480 with around 550k. Have had no engine trouble, but had 2 nox sensors and one dosing module though. People who know tell that the SCR ones are much longer lived.
The euro 6. 450 seems a good truck, but I’m not sure where you get one that’s not been to the moon for 20k.
Mine’s not good on fuel, (6.75 on average) but runnig heavy in very hard territory West Coast Scotland