It's possible the car holds 7.x qts and they're simply dumped in a full 8.0.

Alot of shops have moved to automated equipment vs. the qt. at a time thing. It's faster and there are ecological considerations. The problem as I've been told is that some automated devices have a residual amount of oil left in the hoses. The tech sets it for x number of qts. and you end up with that amount plus what's left in the hose.

A fellow I work with recently had one of these "automated" oil changes done at a Toyota dealership. Two blocks down the street his engines started smoking. It turns out the dealer installed an EXCESSIVE amount of oil.

My guess is that in most cases this is simply user error...somebody is not thinking/paying attention.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"