...Waste Vegetable oil? I have been experimenting with my 1984 Mercedes 300SD on different mixtures of Waste Vegetable oil. I've been reading until it hurts on line prior to trying it. I made a make-shift gatorade fuel tank and experimented with different ratios of kerosene and wvo. It worked, I drove around the block a bunch of times, took it out and about. Smelled funny, but I was moving. Kerosene isn't even sold in my county, well. Walmart for $9 camping fuel. The next county (Tampa) sells it for $4.60 a gallon. So I haven't played around with the Kerosene/WVO lately. By the way I filter the WVO down to 5 microns, I'm going to start to filter down to 1 micron. I have been successfully running my 84' 300SD on a 50/50 mix Diesel fuel and WVO. I also add Diesel Kleen Cetane diesel boost. It is supposed to help clean the injectors. I hear the veggie oil can/will cause coking. I have not experienced lack of power while running on my mix. I know people have been doing this for years. I want to find the answers to learn from others mistakes. I know replacing the fuel lines with synthentic is one. The person I bought the car off of was running wvo mixed with gasoline/ cetane, etc. Car runs great, I do all the work to it. I'm not a mechanic, but I'm finding it's a great hobby and pretty cool it's not hurting the environment. That and WVO that I get is free. Mixing it 50/50 cuts my fuel cost in half. I'm thinking heavily on buying the proper filters, heaters, etc. to run it on 100% WVO. But until I get the $$ (The benz needs a little TLC to boot) I'm running the 50/50 mix and it flys. I do live in Florida, so that helps.