Bought a 2010 Corolla last summer with 84000 miles . The oil had just been changed so i left it until the maintenance light came on at 4500 miles. Decided to change it at 5000 miles but the oil filter cap was stuck tight. Changed the oil with 5w20 . After a while I ordered the proper filter cap wrench and a new filter cap just in case i broke it taking it off. Winter came and the oil maintenance light came on again. I Got lazy and let it go a bit more. The oil still looked clean . Waited until today , which was a whole lot warmer, to change it. Someone had over tightened the filter cap so badly i had to use my foot on a long breaker bar to loosen it. Finally got it off and it looks to be in perfect shape. No bypass to fail , its all part of the motor , so I thought these filters can run a long time and I think I am right. This is a real clean running motor too. 90000 miles and it burns barely any oil. Both times the oil came out looking real clean .