I’ve just reviewed three years of servicing history from a Subaru dealer for my 2016 Subaru Outback.
For the first 5 services, engine oil was charged as 6 litres, not the schedule capacity of 4.8 litres. The 6th service charged the correct quantity. The 6 litres would be correct for a 6 cylinder motor…
At the 50000km service diff oil was charged as 2x2litres. The total quantity of both diffs is 2 litres so it is a double charge.
At the 6th service, the invoice stated that they’d lubricated locks and hinges. One door still squarked and groaned so they probably hadn’t even opened it - it only took a minute smear of dry lube to fix.
Was this all just easily explained errors, a local programming error or an error with a program supplied by Subaru Australia? In each case of overcharging, the overcharged lubricants took the service total a few cents up to a couple of dollars over the “capped” price.
If you have a Subaru, please check your old invoices and post your findings to this thread. If you have some other car, it might still be an interesting review to carry out…