Some clarification: I have an external HDD that gets it power from the USB port. Even if I turn of the computer, the HDD won't shut down, because there's power-off charging on that port. This is my only USB3 port, so using an other port is not an option.
Mobil 1 Extended Performance synthetic oil is recommended for oil change intervals up to 15,000 miles or one year, whichever occurs first. However, if your vehicle manufacturer recommends an oil change interval beyond 15,000 miles and Mobil 1 Extended Performance meets the performance level specified, you can be assured that Mobil 1 Extended Performance will go the distance.
Synthetic oil isn't a miracle molecule, and many synthetics now are not a true synthetic anyway. If the manufacturer says 10k miles then use the oil specified and don't worry. It's not like the old days anymore. If the manufacturer says 10k miles then use the oil specified and don't worry.