Maybe there is something wrong with your car, you should get it checked out.
A car's steering wheel will vibrate when driving if the car's alignment needs to be adjusted.
Vibration of the tire is caused by a uniformity parameter called "variation of radial force". Usually a vehicle's steering wheel will vibrate (called torsional nimble) at a certain speed. This vibration is caused by the harmonics of this radial force. Picture the side view of a tire with different size springs within it. The force of these springs cause a distortion of this force and you feel this distortion in the steering wheel.
get a wheel alignment
It is the engine that is vibrating and it is just being felt in the steering wheel. Can be a vacuum leak, or miss in the engine.
the motor mount is bad
Normally it is a tire out of balance. Can also be a bent wheel.
Your tires need to be "high speed" balanced.
You possibly have warped brake rotors on the front. Or Bad Wheel Bearings.
Normally this is caused by a tire out of balance or a bent wheel.
yes
could be a blockage in your fuel lines.
Your steering wheel will vibrate at higher speeds due to either wear in your front tires or improper balance of tire pressure. IF these are not the promblem look to see if there is damanage to the shaft under the vehicle between the tires. Look at it or get it looked at before it gets worse, believe me I know how expensive it can be later!