I picked up on of these cheap China made 12v diesel heater to heat my Garage, it comes complete with remote control, has a 5L fuel tank wich can run about 14.5hrs. I have it running on a 5amp power supply. This is capable of running 100% used motor oil or motor oil diesel mixture and even used vegetable oil. I just installed it today on the unused door on my garage, this really kick out the heat and all parts are replaceable on the unit. I have just over 200L of used motor oil I am going to start to filter and try a mixture of diesel and used motor oil. if all goes well will pick another one up for my tiny house up north as a supplement heat, but would be outside the house thing cost $200 Canadian and really kicks out the heat. The Chinese copied this from a German made unit that sells for $1500US. There are crap loads of videos on line for this thing.