I have an 06 LBZ as stated in my sig. I know a couple people that have been running WMOin a 50/50 mixture in 7.3 fords for some time without issues. I'm even hearing it has helped fuel milage by a few mpg. My question is; is there any part of the fuel system that would be incompatible with running WMO such as optical sensors and fuel pump issues. I plan to filter down to 5 or maybe 2 microns. and possibly mix the oil and fuel prior to putting in the truck. Any help or opinions would be greatly appreciated.

Not sure what WMO is, but I think you are referring to WVO (Waste Veggie Oil). Try a search on here for WVO and you will get a lot of data to read. I know their are a few people running WVO in the Duramax. I know of one guy on here that lives in Portland and running it in his 06 LBZ for many years with success. I don't know his user name or I would give it to you, but it will pop up in that search.

i was actually referring to Waste Motor Oil. or tranny fluid

Oh OK. Makes sense now. Hopefully someone will come along to help you. I personally would not ever do that.