I'm planning on doing my own oil changes, and any maintenance that can be DIY to my 2015 Infinity QX60 Hybrid. Has anyone out there done any maintenance themselves that can give me some pointers. My first problem is trying to understand the owners manual ambiguity specially with synthetic oil. Also the TPMS is hard to understand if all the QX60's have the pressure sensor that tells you when the tire pressure is correct or is that on higher end models? Just turned 550 miles, please help.