my gar watch me most of the time. occationaly they lay on the bottom but they are inquisitive and entertaining. if i get near there feeder fish tank, the oldest gar comes right up and begs for food. he knows what it is. the young ones stay away from him when he is in that mood but anywere else in the tank they are the first to beg for food.
feeding time, screw a big splash. comparred to gar or exodons, exspecially the gar hunting, few fish compare.
sorry gar versus oscar when it comes to feeding, raising or just watching, gar will always win.
dont get me wrong, i have seen some nice oscars, just i think gar are better. primitive fish all the way!!!
Now to the op, it will be fine for a short amount of time. now it will always be risky to place ur gar wit ur oscar. they could be fine one day and horrible the next. just too dang risky.
And if ur gonna post in this forum, be prepard for a war. Gars have alot of misconseptions about them and we try to correct peoples inproper tank mates and husbandry. we try to be civilzed(WELL some of us

, KFC knows who i mean) but sometimes(ok quite often) new people to gars will not take any of our advice or someone will come along and post knowing full well what arguements could come from it. its a great forum and there are some of us who are quite knowledgeable iin different areas of gar.
E_Americanus is one of the best!!!
the other got permently banned(he had a heck of a temper)
stay around!!!