I am pondering a tire purchase and wanted to know which tire had the lowest rolling resistance. I know Bridgestone makes a "SPECIAL" tire for the Honda Insight which is worth 2 MPG or more over other tires. But as I search for data on this subject it almost doesn't exist. Even e-mails to Michelin came up short. I noticed a comment made by Ernie Rogers in a earlier post touching on this subject and stating he was looking at High Mileage Tires surmising that this equals lower rolling resistance...I don't draw the same parallel though it does have some validity. The only article I found that answers my questions with great limitations was put out by Green Seals Report.. http://www.greenseal.org/recommendations/CGR_tire_rollingresistance.pdf . You guys have any input. I personally am looking at the Michelin HydroEdge with a 90,000 mile warranty though I have no idea if it rolls nice or not?