A processing of waste lubrication oil to diesel-like fuel was conducted through precipitating, heating andblending the waste oil with H2SO4. NaOH is then added to neutralize the acidic of the blends. The diesel-likefuel from waste oil processing is then mixed with standard diesel fuel containing 40%-60%, 50%-50%, and60%-40% diesel-like fuel and standard diesel fuel, respectively. The results showed that from the point of view ofthe calorific value, the content of 40% and 50% diesel-like fuel are still within the allowable range. From thedensity side the pure diesel-like fuel is still within the allowable range. In related to the viscosity characteristic,the content of 40% diesel-like fuel is the upper limit to be recommended for using in common diesel engine.
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