I bought a 2010 Prius in November with 32,600 miles. The car is absolutely wonderful and runs perfectly...I love this car almost as much as my all time fave car I've owned, a Saab 900 Turbo SPG. When I bought it ,it just came off lease, and had perfect Carfax. I registered online at Toyota.com and the car had every single service required, right up to 0W-20 oil change at 29,815 miles. Bought from Rusnak in Pasadena, a high end dealer with as far as I know an immaculate reputation, and was told by the salesman that they change the oil of every car they sell, so it would have also gotten the oil changed again 2800 miles after the Toyota dealer did it. I bought it on Thanksgiving weekend, so just to be sure, I went back and talked to the head mechanic, who confirmed they put in fresh 0W-20. Last week, I started getting a warning "oil maintenance needed soon" on the dashboard when I started the car...it now has 36,500 miles on it. Only either just over 6000 miles or less than 4000 miles after one or the other recent oil changes. Yesterday a warning popped up: OIL MAINTENANCE REQUIRED, which covers the entire area where the display is that shows the mpg, and assorted "modes" the car is running in. The warning only goes away if I click the display mode button on the steering wheel. So...is this normal? Seems like I don't need to change the oil until 39,000 to 42,000 miles,depending on if I believe the Rusnak mechaninc. Or is this like a "low oil" warning or something? Haven't checked the oil level because it was storming down rain here in LA and I have to park outside. Thanks in advance for any help!