One thing about my first car with 20 weight oil is trying to read the level, especially when its fresh it's only one shade darker than instrument oil 10/10 IMHO, coupled with an uneven streak as the stick goes through the tube. I get the oil changed at the dealership because it doesn't cost me anything except predictable wear & tear on the vehicle (let's not go there). I notice the oil line they use has a dial near the spout which sets the desired amount, negating the need to measure afterward? I see in my manual a notice not to fill past the upper mark to prevent possibly damaging the engine. If I had to bet I'd say the level is consistently around 1/8th above the upper mark and the car burns no oil nor dilutes it between changes. I'm thinking of asking for them to turn the dial back a tenth or two of a liter (4.4L cap.) next time. I brought 0W to the dealer this OCI but I've always used their Shell 5W-20, the darker synthetic is much easier to read!