Is your's the same version of the 103 ? How is the performance ?
I normally don't even make it to 6 liters. That's with the dipstick at the halfway mark or a little over that. Can't imagine all that extra oil doing the seals (pressure) much good.
Using the following quote is not really any help understanding your 103's unusual apetite, but what the dealer invoice says is a whole other bag of worms -" on the original service records the San Antonio dealer stuck 7 quarts in @ 1224 miles and 9 quarts @ 7411 miles. "