Hi guys! I just want to ask your opinion regarding excess oil in an engine.

Last September, our new Hyundai Accent (diesel) was scheduled for its first 1000km change oil. Two weeks after the change oil we noticed that the oil level in the dip stick was a bit high, around an inch higher from the "F" or max level, we then brought the car to the service center to have the excess oil drained. right after the oil was drained the oil level on the dip stick was exactly back at the max level. Now after a week, I tried checking the oil level again, this time after around 12 hours (cold engine), surprisingly the oil level is around 1/3 inch higher from the max level.

My mistake was not checking the level of oil after the first change oil and trusting too much on the service center mechanics.

During the two weeks I was running the engine with the oil level on the dip stick an inch higher from the max level, what damage could possibly happen? I made some research and most of the things I've read is the possibility of "foaming" oil when the crank is hitting the oil which of course is bad for the engine.

but is that level of oil really dangerous? (an inch higher from the max level of the dip stick)

Right now, this is the level of oil in our car on cold check:

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