I just checked my mileage now that I have about 800 miles into my treatment. I'm now getting over 36 mpg in town with my Corolla! It's rated at only 30 in town and 35 highway. This was after a complete tune up with new everything, plugs, wires, cap, rotor, pcv, all new filters etc. Most of them didn't need changing however it's a new car and I like fixing things that ain't broke
The car already had fresh plugs, but the place didn't adjust the gap when they were installed, so it was at .015 on all of them. So, I think auto-rx had something to do with my increadible gas milege.