[me and my metro]

I have a similar experience with automatics with cruise control. My previous Saturn L with the 2.2L four cylinder would not lock the converter at 60 mph with the cruise control on. The engine would run at 2600 rpm at 60 and cruise. Turn off the cruise and the converter would lock and the rpm would drop to 2300 rpm. This really affected the fuel mileage at that speed. On my commute using the cruise fuel mileage would drop from 30 to 28.