Here's a sample from my brother's 2013 Ford C-Max hybrid. He says he originally calculated the mileage wrong. There were actually 4500 miles on the oil when he took the sample. He did not drain the oil, he just took this sample. This is the second batch of oil, the FF being the first. He is using a Wix filter and is on his third filter. I suggested he get a TBN next time. He is using the Amsoil Signatue Series oil.