When I owned my 1996 Honda Accord I would get an odd OCI done at the Honda shop so they could give good inspection of undercarriage on car.
Every time they were 1/4 inch overfill, I would bring it home and drain out the extra cup oil. I confronted them before and after every OCI to put 3.5 litres in as required specifically by my manual, they insisted on 3.75 litres with 1/4" overfill. I stopped going there too, had to loosen drain plug each time, might as well do it myself.
1986 Accord, great car, no garbage on it, inline 4 cylinder, 1 barrel carb, no computer ----, dream car for home matainance or fixing, (seldom needed a wrench to it anyway other than OC.
Cyprs