I'd spend the 26$... I've had my current car for over 10 years and 207860 miles, and minimal maintenance, just by changing the oil regularly. I had my last car for 12 years by doing the same thing; If you haven't driven the full 3000 miles you could go another month. You shouldn't base an oil change on the fact that you aren't losing oil.... your car shouldn't lose oil unless there's a problem