New car before 1000 miles ride, should drive fast or slow?

Some take care cars idea, and i not sure is someone write this before but this is my opinion i'm okay if i say wrong.

Nowadays people are confusing of new car should drive slow or fast for the first 1000 miles.

Nowadays, technology has been changed a lot on everything in the car going more digital even the engine also control by digital controller.

Before 10 years (i think so), all the cars are more on analog. Fluid steering wheel, analog meter, analog turning air-conditional, analog radio control player and more. 

10 years ago those cars should drive slow. Why? Because of the engine. I not sure about that but i understand something inside the engine. Before that is a analog control so the engine when ride it will become more heat transfer and its going up continuous temperature won't down if keep ride. That's how the heat kills the engine lifetime. (I guess.)

For now, digital control the temperature of engine increase radiator coolest to protect engine high heat and lifetime.

So now the cars can be ride fastest when get first time, but do not more than 200 km/h for smaller CC cars. If CC bigger car like bmw can be increase more speed. Because CC bigger, horse power main powerful as well but again not up to maximum speed. 

Should take care as well not maximum speed of the cars. 

Larger CC car, can go more faster. Smaller CC car, can go more slower.