I didn't with my JSW (purchased first, with no knowledge of TDIClub

) With the Jetta sedan, I did what I thought was Drivbiwire's advice...finding the few longish hills near me, and doing several descents in a row, allowing engine braking in a lower gear all the way down. Ditto for climbing the hill, holding the gear as long as possible, while under load. Seemed abusive, but...
My Jetta sedan consistently got 3-5 more MPG than the JSW. Could be the additional weight of the JSW, combined with the 235/45-17 tires on the JSW. I prefer to think it's because the rings were broken in better.
So...I have already spent a few miles in the Passat, using the hills as above. We'll see how it works. FYI, I was always certain that coolant AND oil were fully warm before any excessive load or revving.