i have a Husqvarna 357XP that does not leak bar oil. I might find a very small bit if I come back the day or two after I set it down, but if I move it to a new spot after that, nothing more comes off the saw. I suspect that initial little bit is just oil that is already on the bar or soaked up in in the sawdust under the clutch cover. Once that has dripped off, I don't see anything further until I run the saw again.
My Jonsered 2152, however, has leaked oil since the day it was new. Leave it sitting anywhere for a day or two, and there's a puddle under it. Move it to a new location, and there is a new puddle. A friend with the same model saw has no leaking problem. I found a YouTube video about fixing a common source of leaking bar oil on the Husqvarna 353 (the twin sister saw to the Jonsered 2152). I believe the parts in question on the two saws are the same. I've been meaning to try it on my 2152, but haven't gotten around to it yet.