I’ve seen it done before and was wondering if it’d be worthwhile investment to add kitchen oil removal to my existing family’s trash service and basically get paid to collect fuel for my garbage trucks.
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One thing I don’t see mentioned yet is that vegetable oil is technically fat. The important distinction here is that it contains triglycerides, which have a tendency to gum things up, particularly if it doesn’t stay flowing.
Waste oils in general are considered inappropriate for direct-injected diesels, although you may get away with diluting them in pure diesel after properly decontaminating them. The older mechanical diesels are much more tolerant, but you still have to deal with decontamination, gumming, gelling in cold temps, and viscosity in general.
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