Any gasoline operated vehicle can get better FE/MPG by using non-ethanol blended gas, however, but service stations that sell
100% gasoline is becoming increasingly rare. Usually these non ethanol gas stations donot exist in metro areas. To find a gas station in your region/state that sells *real* gasoline goto....I found that the mileage on my 2010 Prius III using the OEM Yokohama Avid S33 improved when I increased the tire pressure from 35 psi to 44 psi for the front tires and from 33 psi to 42 psi for the rear tires. My overall MPG increased from a top 58 mpg to a top of 66 mpg. The higher psi lowers the rolling resistance. I have to monitor the tire pressure constantly because the Yokohamas Avid S33 seems to loose one or two pounds of air pressure every week ( the Avid S33 maximum designed/ rated tire pressure is 44 psi ). The lower tire rolling resistance makes it easier for the MG/ICE to drive the Prius but more importantly the LRR improvements extends the Prius's ability to *coast* downhill ( where it seems to have the most significant effect on the FE). On the down side, the weekly resetting of the tires at these higher pressure appears to have caused my tire foot pump to fail prematurely(9_9)
Walter Lee
2010 Toyota Prius III, Blue Ribbon/Dark Grey Yokohama Avid S33 (front 44 psi, rear 42 psi) Scangauge II (AVG, RPM, MPG, FWT), Garmin 265WT, OEM floor mats Washington DC Metro AreaHypermiler in Training. :-P
+6000 miles, computed overal fuel efficiency =3D60 mpg. Worst tank FE =3D 54 mpg computed Best tank FE =3D 66 mpg computed Last tank FE =3D 58 mpg computed