I've just bought a 93' 300d 2.5 turbo and am running it on 50% WVO and 50% diesel. There is a kit that requires no extra tank for running 100% svo or wvo. It keeps the relay on the glow plugs on longer, comes with special injector nozzles for spraying the veg oil, a preheater and some other stuff. Basically it's hassle free after installation. The company is Elsbett out of Germany and it costs 1050.00.