Fuel Saving Tips
On a modern car, auto fuel cut off will be activated when you remove your foot from the accelerator while traveling downhill. If you want free intermittent A/C turn it on while traveling downhill or slowing down with your foot off the accelerator. You may feel a very slight increase in engine breaking when you turn the A/C on but it is minimal. There is a kit available online that activates the A/C when auto fuel cut off is activated (I don't know where you can buy it as it was a while ago).
posted by Swiftkick on October 26, 2014
this tip works for 50% of voting Fuelly members.