Any scope to adjust the hinges?
This. Though, be careful.
TBH, I’d more likely borrow an electric plane from someone and just shave a mm off each one. Sometimes, it’s only the tiniest bit that makes the difference and won’t lead to a mahoosive gap when the heating goes back on.
Also, if you know what you’re doing, you can plane a leading edge on the doors. This is not strictly allowed and again, has to be done uber carefully.
Oh, and the oil doesn’t make the doors impervious to climatic changes; especially softwoods.