Hello, we have 1o Scania R420 Euro4 running in local transport (80% highway / 20% highway). These are all 4-6 liters/100 km above the predecessor vehicles (99 Actros 2540, 2001 TGA 410). Scania knows no solution, driver training has brought only a small effect. Now my question is whether there are others who have the same experience with this engine. We also have 5 SZM running 420 hp in Euro5 in long-distance traffic, this has top consumption. Would be grateful for any help. Greetings