so, i've made some driving experiments concerning the topic. when coming to a full stop i used to stay in gear until rpms dropped to 1000, then i'd take it out of gear and complete the full stop. then i decided for a while to take it out of gear as soon as i started slowing down to come to a full stop. i did that thinking gas mileage would improve at least a little, but what i observed was the opposite. coasting actually made my gas mileage worse. i also coasted on down hills.
my present conclusion is that coasting burns more gas than leaving it in gear when coming to a full stop. i think the throttle hang has a lot to do with it but i also think the SVT, which is what i drive, burns a lot of gas when idling. it seems to me that it burns more than it should when idling.
what are y'all's thoughts on this?
