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.
If you have been doing short trips in town you will need shorter oil change intervals than if you are driving on the freeway a lot. It also depends on the type of oil. Synthetic oil will go a lot longer than mineral oil without sludging. What you don't say is 1000 miles past what - how many miles it has actually been. If you are up to 4000 miles now it is no big deal. If you are up to 11000 miles now (some cars, especially in Europe, are going to 10K mile intervals) that is a bit much. My Prius sedan has 7500 mile intervals, 5000 in severe conditions.