I use Ethos FR and it seems to help in many ways, most notibly fuel economy and less pollutants. I stumbled across it when trying to get my Dakota through DEQ a few years back. It worked for that slick as snot. http://www.ethosnw.com/
1968 Charger 383/2bbl/4spd (1 of 74)
1994 Dakota Sport 3.9L/AT/2WD
2003 Durango SLT 4.7L/AT/4X4
Yes, all Dodges and nothing else