I've put about 800 miles on the Michelin Energy Savers. Yes They do....save gas. I went from some worn out Uniroyals with 40,000 miles to these tires. The first tank if gas took me from 18.9 MPG to 22.3 MPG, an 18% increase. the tires will pay for themselves in less than a year of normal driving. They are Michelin quiet, smooth and responsive on top of that. If they hold up over 40,000 miles they are a bargain.