Go up to 5000K miles if you drive mostly on hwy. With synthetic oil, 6000-10,000 miles is the norm.
At what percentage oil life should you change your oil?
My dealership recommends it be changed at 15%. It's going to be a personal preference if you want to go less than that. I would definitely not go below 0% though as there may be some data left in the car that could be pulled and impact a warranty issue if one was to arise.
How long will a 15% oil life last?
Assuming you should get more than 7500 miles per oil change, 15% would be 1125 miles. much more than 300. So you should actually be able to go 3 and a half times 300 miles or around 1100 miles before your oil is “used up”. And that assumes conservative oil changing; oil can really be expected to last well past that.
Should I change my oil at 15 percent?
If we assume the regular oil change interval is 3,000 miles, 15% is 450, so you are good to go. However, I wouldn't take either the oil change interval or your car's gauge as gospel because both are likely quite conservative. Consequently, you are probably fine for much more than 450 miles.
What does it mean if my oil life is at 15?
You'll see "Oil Life" with a percentage number on your dashboard. So at 40%, your oil still has 40% of its lifetime remaining to do its job before it needs to be replaced. At 15%, your oil still has 15% lifetime remaining, and so on.