Ever ask yourself, Why Do I Need to Change My Oil? During normal Engine operation. The Oil will gather contaminants. If the Oil is not changed. Those small particles will start to clog the oil passages. When internal parts lose oil pressure, friction starts. Which leads to heat, then wear. Look at the 2 middle pushrods. That wear is due to Lack of Oil. The 2 on the outside have normal wear. So…. Do I need To Change My Oil? The answer is, you don’t have to do anything!!! But if you want your car to last, I suggest you do.