XC90 D5 – A true drunk ???

A little elkology! My next elk should become an XC70 D5 or XC 90 D5. However, I hear (also from Volvo dealers) different horror stories about the consumption of the XC90 D5. It should consume minimum 12 to even 15 liters or higher. I’m surprised because my elk (V70 D5) consumes around 7 – 7.5 liters with a brisk driving mode. My wife even creates the unattainable 6.3 -6.5 liters brand for me. (130-140 Kmh) Since I’m not exactly a “defensive” driver, I think that an XC90 would be a true drunker for me. The XC 70 D5 should, according to dealer statements, consume quite “normal” as the V70 D5. (?) Maybe it’s an old topic, but I would still be interested in how high is the average consumption on long distances? Greeting Barna