Amsoil SELLS an oil filter with their name on it they don't make it. It can be made my either Champion Lab, or Wix depending on which filter it is. All of Amsoil's filter are good, some are even better. Their EaO line of filters is a extended use, long drain interval filter and as good as they get. Not the best performance filter due to its flow rate, but it is a great filter for your daily driver. The Royal Purple filter is very similar and made by the same company.