Blending with new VO

Single Tank WVO systems and blending SVO WVO to thin it.

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Blending with new VO

Postby John Galt » Wed Mar 05, 2008 3:35 pm

New, clean dry oil from the store is a good way to start with VO fuel blends.

VO blends can work well if the vehicle has a simple mechanical fuel system, and the temperature does not get much below freezing. Start with mixing new VO in 50%-25%-12%-6% samples with the diesel fuel you use into a series of small jars, then chilling them in the fridge to see how they react to cool temps. Vehicle test first with lower percent VO mixes and work to higher percents in small steps, testing each mix in the vehicle.

Note how much smoke is exhausted on cold start-up with D100, and use that as a baseline for further observations with blends of VO. If more smoke or rough running occurs with a blend, then either pre-warming the engine or reducing the percent of VO will be required to reduce engine deposits which will contribute to shorter engine life.
Last edited by John Galt on Wed Mar 05, 2008 5:34 pm, edited 3 times in total.
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Postby SunWizard » Wed Mar 05, 2008 4:10 pm

I was confused by your post at first, until I realized you were talking about many sample jars, each with different % of VO added to diesel.

I agree. Its also useful to note that canola oil is better in cold than any other oil since it clouds and gels at the lowest temps. Soy is more common but not as good in cold. Corn, peanut, and palm oil are progressively worse.

This is why its good to try john's above tests with samples of the average VO that you get from your sources. I think this kind of testing is needed with new or waste VO if you are blending in a cold climate <30F average nights/days. But especially with waste since you may not even know what kind of VO you got.
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81 Mercedes 300D- stock and happy on V80/D20 blend.
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Postby John Galt » Wed Mar 05, 2008 5:29 pm

thanks, I edited it for clarity.

Canola is the very best cold temperature oil commonly available. I started by experimenting with new oil, then switched to dewatered and cleaned used oil once I had my collection and processing set up and running.
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