OK well I've now gone through two tanks of gas with a clean filter.
The first tank I complete SUCKED the gas... I was riding high on the enjoyment factor.
Next tank I drove like my normal self (which, if you know me, I still drive pretty hard) I turned in a MPG of 22.51
An expected result.
I'm sure the results would be even better if I didnt drive hard all the time.
21.4 MPG filthy
22.5 MPG clean
I just filled up and reset the trip, I'll post another MPG in 2 or 3 days.