Almost everywhere I've searched, I read that Dot 3 should not be used in my 73 TR6 brake system. However, Dot 3 is what the reservoir lid tells me to use. Also, would this also stand to reason that Dot 3 is used in the clutch, too? I did read one time that the use of Dot 4 or 5 only applies to the very early Triumphs. Can anyone help me with this. Thanks.