I do wish you wouldn't fry things in margarine g. It's disgusting stuff, full of additives. I tried it once, and there's obviously some water, or similar, in it, it spits like heck.
Olive oil with added butter is my preference, unless it's an omelette, which requires just the butter.
I had a tub of Utterly Butterly in my fridge, which I was forced to buy at a camp site, where nothing else was available. After some months I opened it, to find a tub full of mouldy gunge. That was in a fridge, and it still went rotten! WTF is in that stuff? Butter would still have been usable!