Interesting, I did my first oil change at 5000 miles. I recently purchased my m40i in January of 2019. Dealership did a software update for some emmision controls after my oil change. Ever since my m40i has a hesitation when you come to slowing down to make a right or left turn, then accelerate it has a delay response. At the light when you stomp on it, it also would delay for a second then kicks in. This is so irritating!