get on 和get into当表示上车时,可以互换使用么? 并举例.

No,they cannot be replaced.
Get on is always followed by big vehicles like bus,plane,train,etc,
However,get into is followed by small vehicles like car,cab,helicopter as an exceptional.how about "get in" and "get into"?in here in the phrase is an adv., which means that it cannot be followed by an object. Eg. --- It is raining so hard, why not get into the car?/ why not get in?