BEFORE starting the game!!! Pre-setup options - READ!

[Arayas]

Optimal Buffer Page Size

1. Navigate to your game's Documents folder "C:\Users\(USER)\Documents\Euro Truck Simulator 2"
2. Open “config.cfg” file.
3. Find “uset r_buffer_page_size” and change the value from "10" to "30"

Steam Launch Options (Steam/Euro Truck Simulator 2/right click/properties/general/advanced launch options - last box)

Best Options based on amount of RAM copy/paste there:

8GB:
-64bit -nointro -unlimitedlog -rdevice dx11 -mm_pool_size 4096 -mm_max_resource_size 32 mm_max_tmp_buffers_size 1000

16GB:
-64bit -nointro -unlimitedlog -rdevice dx11 -mm_pool_size 8192 -mm_max_resource_size 32 -mm_max_tmp_buffers_size 1000

32GB:
-64bit -nointro -unlimitedlog -rdevice dx11 -mm_pool_size 16384 -mm_max_resource_size 32 -mm_max_tmp_buffers_size 1000

Many thanks to GMC Team for compiling this.