Bought the car about 3 months ago. It had been on the lot for about a year. I was interested in the MPG. First oil change at dealer around 2800 miles. Wasn’t very impressed with dealer oil change. Unknown what brand of oil. Etc. Second oil change at 7100 miles with M1 0w20 AFE. Within a day or so I began to notice at highway speeds the engine was quieter. Car turns 2500 RPM at 75mph. My daily commute is 150 miles round trip. Wind is a big factor on MPG. Lowest thus far is 44mpg and highest is 65mpg for a round trip. The car won’t win any races but it sure is nice bypassing the pumps.