Ok guys I'm after some tips from people that have got some good ideas to improve economy on E38 ECM equiped cars. From what I can see and the little experience I have with tuning these computers (only tuned 1 E38 car), there isn't much available for us to tweak. Things like DFCO which are only touched on in the cal. I don't see anywhere where I can alter TPS and mainly MAP activate point. Also is there a planed update to include a lean cruise or some other way to alter cruising AFR's, in a semi open loop fasion. I know I could do a work around by forcing OL and tricking the ECM to going lean while cruising, but I don't really want to go down this route. So far the only way I've been able to improve economy on these cars is to optimise timing. It works but there is better gains to be had if I could alter fueling.