a log is different from a wheel!!!!!!!!!!!!!!!!It needs friction to start rolling, or to accelerate the vehicle, or to stop rolling.
But it doesn't need friction to roll at a constant rate.
If there is no friction, the wheel's forward velocity will stay the same, and its angular velocity will stay the same.
Consider a log on (frictionless) ice - if you manage to start it rolling without slipping, it will carry on doing so for ever.
Why do cars skid on rainy days? Because there is lower friction with the road. Thus when they turn, the torque is too much for the wheels to handle thats why they slip