since when do you use Euros?
lol he just made the conversion to make it easier to realise for us.
About the 323, well since I'm not the owner and not the only one driving it (just during these holidays I'm the only one) I don't know when were spark plugs changed for the last time, but oil was changed not long ago. About a cleaner, I'm quite sure it has not been used, at least not recently.
Still, I doubt it would have a really lower consumption when driving on the highway at 100+ kph. I didn't pay attention, but I feel like it had less "attention" since a few years ago, after it had an accident (my brother got hit by a blonde driving in the middle of the street from the other way, she wasn't looking at the road) the insurance declared the car was worthless, so my brother just repaired the car to make it drive well, but stopped paying much attention to it.