Hello, I am thinking of getting older Benz from the 90s. Depending on what it will be, it could also become a diesel. Unfortunately, the diesel prices have shot up a bit. Now I wonder if I could drive with some diesel vegetable oil. Is it even cheaper to drive e.g. to the selgros and to buy some giant canister oil as additive or complete tank filling. Is the utopian? Are there much higher maintenance costs on a too? Greetings Psycho