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.
Auto experts say synthetic oil provides the following benefits: - Long-lasting. Synthetic oil takes longer to break down and is designed to last for 7,000 to 10,000 miles or more between oil changes. Conventional oil should generally be changed every 3,000 to 5,000 miles. - Fewer trips to the auto mechanic can result in reduced costs overall for oil changes and fewer air filters.