Wow! - no it wouldn't have been okay
A litre overfilled - crikey thats bad enough, but to additonally ignore it when pointed out is negligance.
It defintely wouldn't "burn off" quickly and you would have been running serious risk to your engine all the time, the level could have taken 6 months to drop to normal.
Good you went with your gut feeling and did the sensible thing , it only takes a few minutes.
TB
Originally Posted by flippedbit
Took it back today and got it drained. Mechanic still reckons it would have been okay. I will have to take it somewhere else next time as he obviously hasn't got a clue.