I rented a cobolt from enterprise once with an automatic tranny. It seems to do the fuel cut thing down to almost a dead stop. This made great for p&g without messin with shifting to nutral or turning the ignition off. I had fun flooring it at every stop light til I reached the speed limit, then lifting and coasting til the next light. Saw a 40+ mpg on the display. That was one of very few rental cars Ive driven that got more than 20 mpg.