Maybe the multi gun was outside the torque spec. on the production line and subject to a TSB, in which case it could be over tightening.I had the car booked in today to check all is well with fuel system re the poor MPG.
Came back with clean bill of health and told it needs more miles mon it to loosen up.
The service guy did say they did the recall work whilst it was there.
He didn't know what it was other then 'wheelnut checking'.
Not much info sorry all, but that's all he said.