Hi Sean, If you check out the Technical Resource Library (TRL) you will find this information regarding oil and oil filters that we use on our Tbirds. Here is that link.
That will take you to that subject. To view the TRL at any time, just look for any post I have made, or click on my user id and it will show you my signature element. At the bottom of it, you will always find the link to the TRL.