When Michael is spraying the oil into the tailpipe of the truck near the end, a close-in shot shows a black Mustang parked behind the truck. Shots before and after show a red car behind the truck.
Nitrogen is invisible, being as it is what 78% of the air around us is made of.
When Michael and Bolo are at the Cafe waiting for Lynch, when Michael is saying "That's what happens when the chlorate kicks in. Your hands will shake and then you have difficulty..." you see the actor's mouth movements don't match the dialogue.
Sam says Sugar took four shots from an assault rifle, but the assailants were carrying MP5s which fire 9mm, a pistol round. Sam should know the difference between wounds from a pistol round and a rifle round.
At the end of the episode when Michael and Gilroy meet to discuss their failed operation, Gilroy pours whiskey from a bottle clearly labeled "Glencallan", but Gilroy says that the whiskey is Dalmore.