What % of clean vegetable oil can i mix with diesel without causing damage to he engine?

Oil is dripped to measure how thick it is. Veggie oil is usually quite thick - unless you're using extra - virgin olive oil! I used to work on a heating system and the oil was that thick it was like sludge so it was thinned by heating with a sort of immersion heater - and it burnt like a jet engine - once we got it to start - it was starting it that could be a problem!What % of clean vegetable oil can i mix with diesel without causing damage to he engine?
I think it is just veg oil from the bottle....though im sure its illegal!!!!What % of clean vegetable oil can i mix with diesel without causing damage to he engine?
Unless you have a properly balanced mixture you will ruin your exhaust system and spue out loads of black soot, which is not at all environmentally friendly. Follow the car manufacturers advice, visit their website or contact their customer services.
Depends on system and ambient temperature. Ford for example Does not recommend any more than 3%
100%
Depends on the engine. An older engine will tolerate much higher mixes than newer engines. A better way would be to convert the oil to biodiesel and then it can be mixed in any ratio up to 100%.
Common-rail diesel engine? Probably 0%.





Direct injection? You can probably get away with 10 or 20% until the carbon formed wrecks the piston rings, that might take over 1000 hours of operation to happen. It will probably carbon up and block the injectors before that.





Indirect injection engine? (These have not been made for cars since the mid 1980s) you can run a lot more straight vegetable oil, but then you run into problems with the injection pumps. Can they handle the extra viscosity?





Bosch injector pumps are supposed to be able to do so, some others fall apart quickly. With lots of straight vegetable oil in your fuel you will have problems cold starting and even with indirect injection you may have carbon problems with the injectors.





You can run straight vegetable oil if you heat the fuel tank and the fuel lines, use a Bosch injector pump and possibly special injectors with an indirect injection engine, also a much bigger fuel filter to allow adequate amounts of the more viscous fuel to flow through.





You will need a second fuel tank for petroleum diesel fuel for cold starts, and you will have to switch from vegetable oil to petro-diesel before you stop the car to allow the diesel fuel to get through the lines if you anticipate a cold start after parking the car several hours.





If you saw the Mythbusters running a diesel Mercedes-Benz on straight vegetable oil remember that the vehicle was a carefully chosen mid 1980s model which they probably did not mention. The car used had a Bosch injector pump, which is said to be able to take the extra viscosity, it also had (I'm pretty sure) indirect injection.