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I understand many of the expenses and trouble that goes into turning waste oils into diesel fuel, but I have worked out many of the kinks, for instance, I bake-flush my filters, so that I have not had to replace one in 3 years. Too bad you do not live in AZ, because I would have been very...

I am not sure what you are planning on filtering, but if it is WMO, then most of the particle load in WMO is below 1 micron in size, so either a centrifuge, or an extended settling period works best. I found it take about 2 months for most of the carbon to settle out of WMO.

So far the additive package, or detergents, etc. has not posed a problem; however, some injectors that get coked from burning WMO come out yellow, not black. I believe this yellow color is sulfur, and sulfur might be the main ingredient in the so called "additive package" in motor oil. The...

My setup is simpler. I pump off the top just enough waste oil so that I can pour in gasoline at 20%. I do not even agitate it. I then leave it in the bucket, or barrel, or tote for 2 months of settling, then I pump off the top 80% through a 1-micron bag filter. The bottom 20% will be...

I have tried adding solvents in stages, such as gasoline at 20%, after 2 months of settling to remove all of the sediments, then separating them out, then adding a polar solvent, such as acetone, has healed more precipitation of carbon. Also, blending the WMO experiment with a similar WVO...

You could look at my YouTube videos for this and save yourself a lot of time and effort Blending Solvents with waste Vegetable Oil to Make VO Blend Diesel Fuel While my experiments in that video were with vegetable oil, in later videos I show it applies to motor oil. More significant to your...

The problem here is understanding the difference between suspension of particles and dissolution. Whereas, particle suspension is where the particles still exist, they are just floating in the medium, and often too small to filter out. Abrasive particles floating in a medium can be a source of...

A centrifuge will remove all of the suspended fine particles; however, a centrifuge cannot remove the dissolved carbon and metals. You could use partition chemistry (aka Partition coefficient) to force the dissolved carbon and metals out of solution.

WMO is typically distilled in the industrial level of recycling it. The centrifuge removes all of the suspended sub-micron particles, but no filter, or centrifuge can remove dissolved solids, such as carbon and/or metals. That is what distillation is for.

Good to hear you are going to try the gasoline blend idea. I assume you mean by 30% the 70% will be diesel fuel. I think that is a really wise, and cautious way to explore waste-oil-gasoline blends; however, there is a relationship between any waste oil and gasoline that should be maintained...

Thanks for the useful information on biodiesel, Jeff. I do not use pumps when moving my waste oil-gasoline blends, due to the problem of emulsification. Instead I use pneumatic pumping, which is just producing a positive pressure above the fluid needing to be moved to a tank that has a lower...

It is common practice in the UK, where biodiesel is far bigger than it is here in the USA, to add gasoline at about 5% to biodiesel, which reduces gelling, and forces water out of solution with the biodiesel, which prevents algae formation.

No, you want any precipitates to form, so that you can remove them. After removal there should be no more precipitates; however, it takes about 2 weeks for all precipitates to settle out from WVO-gasoline blends. It takes about 2 months for all precipitates to settle out from WMO-gasoline...

As for biocide for diesel fuel and biodiesel, gasoline in small quantities will kill the critters in the fue, and force water out of solution. 5% should work fine, and it helps as an anti-gel in the winter as well.

I am not supprised that you found no change running 25% gasoline to WMO on your diesel genset. Like Iceman3005, I filter down to 1-micron all of my blends, but after settling. I found even after a week of settling, then filtering to 1-micron, a centrifuge still pulled almost a full bowl of...

I am not surprised that you had trouble running 70%wmo to 30% #2diesel on a 6.2. You will find that 20-30% gasoline, or 30%-50% kerosene to WMO will work better. Also, WMO tends to be very dirty, so I recommend blending, then settling it for at least a month to 2 months, or run it through a...

Jack, at Jack's surplus in Tucson told me that he has been farming the diesel fuel out of the fuel tanks on his 40 year old surplus fleet for years, and swears it works just fine, and does not evaporate. Otherwise blending any kind of alcohol with poorly filtered WVO is surely going to result...

Theoretically, yes WVO and WMO can be processed in the same way; however, not everyone makes waste oil blends in the same way. I blend with gasoline, not diesel fuel, as my blending agent for a number of reasons: 1] I need half as much gasoline to blend with waste oils as I would if I blended...

I too blend at the 80:20 ratio most of the time, but in the winter I add more gasoline to my blends; however, I found that a silicon seal in my IP would swell and fail if I exceeded 30% gasoline in the blend. I found also that it was the alcohol content in US gasoline that causes the seal...

It is not clear how you are burning your waste oils. Are you burning them straight, heated? Or, straight, unheated? Or, blended with a solvent, such as gasoline? If you are blending with a solvent, such as gasoline, then there is no need to heat your waste oils for processing. All you have...