I just purchased my 2004 SR5 V6 with 140k, I was getting 26+ doing 70 mph on the way back from Tulsa, I am very happy with that. But in the past when I have went from a Highway tread to AT it seems to dip quite a bit, So my question is, has anyone experienced a major drop with the V6 going to an AT tire? If so are there any recommendations on a good looking/long lasting HT tire? Thanks