Quoting :
https://www.survivalistboards.com/threads/waste-motor-oil-as-fuel.149248/post-5102342
"
What you'd like to look for is a diesel engine with a VE pump (injection pump.) These include older Cummins 4bt/6bt, chevy 6.2/6.5, ford 7.3, vw 1.5d 1.6d 1.9d AND 1996-2003 TDI's (same exact pump as the older diesels, just with a computer), mercedes 240d 300d, and perkins engines found in the older ford rangers to name a few.
Typically these are the engines people choose to run WMO though. Some are direct injection, others are indirect injection (fire into prechambers, and not directly onto the piston.) I've read that the prechambers are better for WMO due to their design, and being able to hold heat better, but it's argued both ways on the boards"
Apparently ve pumps like wmo. The nippondenso rotary fuel pump on a corolla diesel apparently represents a copy of the bosch ve pump, so that helps.
I read online that the best fuel pumps for wmo get their lubrication from the motor oil and not the fuel. Which fuel pumps get lubrication from engine and not the fuel? I heard the merc w123 pumps get lubrication from engine oil, big plus there. I think the corolla diesel fuel pump gets lubrication from fuel.