What combination of Steering Sensitivity and Non-linearity minimizes turning during straight-line 140 kph driving?

Assume:

1. I use just my keyboard. I have no steering wheel and dislike using the mouse to steer.

2. I'm using a Car Mod, not a truck.

3. I don't want to slow down.

I like to drive 140 kph on highways, but something's amiss! Even on straight roads, every 5 seconds, the car stops going straight and drifts towards the lane markers. To keep the car in the lane, I must push A or D on my keyboard, but a single keystroke turns the car too much, especially if the highway isn't straight. But I want to push A or D as little as possible on straight roads! What positions for

1. 'Steering sensitivity'

2. 'Steering non-linearity'

fit this driving style? Here's source for screen-shot.

Solution 1:

I use just my keyboard. I have no steering wheel and dislike using the mouse to steer.

You can't change the Steering sensitivity or Steering non-linearity settings when using a keyboard because they are exclusive to analog controls (gamepad and/or steering wheel).

I'm using a Car Mod, not a truck.

The Prism3D game engine of Euro Truck Simulator 2 and American Truck Simulator is not meant to be used with cars, this can cause weird physics when driving anything other than trucks and busses.