BMW i3 comes in a few different flavors and one of them comes with the range extender option. This option adds a small generator to the vehicle that allows you to extend the range on your electric vehicle. I, personally, love this option as it allows me to go much further on my EV without the fear of getting stranded, but this does add some additional maintenance to the BMW i3. One of those items is changing the oil once a year. BMW recommends putting new oil in every 12 months or 10,000 miles whether you run the generator or not since oil degrades over time. In this video, I show you how to change the oil on your BMW i3 w/REx for under $50. This is an easy DIY to tackle at home for anyone and save tons on dealership prices! BMW recommends 0w-30 oil for this engine, but I’m using 5w-30, please pick your own oil and go as per BMW’s recommendations!!