eli5 What are the downsides of taking a diesel powered truck and converting it to run on used cooking oil?

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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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**Getting the oil**: you’ll need to work with places who likely already have contracts in place to instead use your services to reclaim their waste oil. This can be difficult depending on your location as there may only be a few players who have monopolies on the service so it can be difficult to compete on price.

Additionally, if you don’t already have the equipment necessary to get the oil from a grease trap you’ll need to invest in that

 

**Cleaning the oil**: This is probably the most important step as used cooking oil is often full of particulate matter (small PPM level soot/etc. as well as larger items like chicken bones) that will need to be filtered, but you’ll also need to ensure you’re properly drying the oil to remove excess water. This will require space and equipment and can be quite involved (this isn’t including the space requirements of just storing the feedstock or finished fuel).

You’ll also need to get used to testing (usually via sending samples to a dedicated facility) your oil-fuel to make sure its consistent as you’ll want to avoid large variance from batch to batch in your finished product.

 

**Using the fuel**: ToxiClay already spoke to this but the key is the viscosity which you’ll need to keep in mind.

 

These are just some things to keep in mind if you want to go this route.

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