No, yours is the first case I have heard of.
Hail's is a 1.2TSI not GTI so that probably explains the better fuel economy, however I generally average 6.8L/100km, mixed cycle driving since removing the resonator from my car, I used to get 7.1L/100km. That being said, I'm topping up after about 560-570kms when the light comes on...
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