You won't even notice it in a few months.it's not noticeable until it's pointed out.
Get a big bag of baking soda and pour it on the floors like you would your carpet at home. Then put the remaining in a big bowl and put it in the back seats. Close it all up and let it sit for a few days. The baking soda will pull that odor out of everything.It's also worth noting that the interior now smells like burnt oil, which honestly angers me more than the blown engine lol I'm not the least bit worried about the rebuild or replacing the engine if it comes to that, but getting that smell out of the car is going to be a nightmare.