Having to top up oil at least twice in between services is this normal? BMW x3 two years old or the oil light comes on

Get to the dealership, isn't it under warranty? The standard for oil consumption before it is considered a problem is 1Qt. per 1,000 mi. (or it used to be) but I wouldn't expect a car that new to use much if any but certainly no more than 1qt. per 5,000 miles, unless you already have 100,000+ miles on it. I threw those figures out because you didn't say how far you are going between changes or how much it takes to top it up. BTW, I hope you mean the oil low (amber add oil) light not the red out of oil/stop the car light. If it's red you'd better look for a huge leak and start with the filter and drain plug if you are going to quik change places.