Her W1 took her to the command performance of "W2" ,then they dined on oysters, champagne and spare W3, but all she remembers is a beautiful operatic march and a swishing W4 of his Lamorghini's engine.

Btw: 768 18M8M2819 3T 58LL...
In the above text the 16 letters of the bold-font words (w1,w2,w3,w4) are represented by nine of the ten decimal digits - each digit for a certain letter.

Decode and solve or solve and decode:
W1=W2-W3
W4=W2+W3.