We have two 2013's the earlier one has a 0W-20 oil cap and the later one has a 5W-20. The few times that I changed the oil I used 5W-20 full synthetic in both of them. Energi models only need changing every 20,000 miles or every two years. Most of our driving is around town in EV only and the engines hardly ever run, so ours have been every two years. I guess I could go with the 0W-20 from now on. Thanks for the information.