I would start with a compression test and then look for excessive blow or air pushing out the valve cover. Sounds like bad rings to me or, they didn't break in well even though there was cross hatching in the cylinders. If you upshift and run at higher RPM does it smoke out the tail pipe then? You would need to have someone follow you to observe that.
Gee Wiz:I brought the injectors in and had the nozzles changed but i think the guy didnt really want to know and didnt set pressures or anything like that.You could have done that work yourself! The idea for others doing that sort of work is that they get the pop off pressures set AND balanced between the set. Not good to have one going of at one pressure and another being drastically off from that. This is what the little shims in the injector are all about.Regardless that is done and it may be a source of the white smoke. White smoke in my experience comes from advanced timing or water in the cylinder. If your pop pressure is off it might be comparable to early timing. Try the other set of injectors. Bad injectors do equal bad mileage by the way. And sooty pipes, heat shields and injector base.As for the ATF in the cylinders overnight. Better to do a cleaning with some diesel purge recycled in the pump for a bit or a dump of a can in the fuel and run it longer term. I understand your idea to cut through the buildup on the rings so maybe do all three? Let us know if the initial soak does any good as I don't remember a discussion of such a technique on here in the past. Might be a new tool for us to use.Thanks.