Originally Posted by KneeGrinder
Like said above, you could run used oil of many types, but its really a very very bad idea. Trust me, you don't want to run contamination thru your injectors no matter what type of diesel you decide to run it thru.
I have followed others on diesel forums as they ran used motor oil, transmission fluid, thru their motors. They ALL ended up replacing injectors at the least, some knew they were going to rebuild the motor, so they tried it to see how far they would get till the motor gave up the ghost. They all gave the ghost and it didn't take years. The longest daily driver I recall didn't make 9 months.
New oil of any type in a GM 6.2/6.5, Navistar/Powerstroke 7.3, motor oil, transmission fluid, any kind of cooking oil, or you could make Bio diesel out of used cooking oil also.
50%/50% will burn fine Diesel/motor oil, Diesel/transmission fluid, but it will smoke like a coal freight train without even hammering the throttle. 50/50 is really too much for California, you will have problems, people will be calling in your plate # all day long, especially where your located= lots of tree huggers!
Try 10/15/20% and see how bad it smokes, it won't hurt a thing on any of those motors I listed!
What about diesel smoke pouring over children walking to school, is that "tree hugging" to report a inconsiderate driver doing that? Is there some kind of enjoyment in putting fumes in other people's lungs? Or is it all labelled "tree hugging" to object?