If one blends solvents with VO in a single tank system any Partially Hydrogenated Oil and Fats will cause problems in cold temperatures below 50°F if they're not separated out by the processing before the VO mix goes into the vehicle.

Cold upflow will still clean and dewater the VO, it just won't remove PHO and fats if the processing temperature is above 50°F.

If clear VO is used to cook only fresh potatoes then PHO and fats won't get introduced. Anything else cooked in the VO, especially pre-cooked frozen foods, will introduce PHO and any meat cooked in the VO will introduce fats.

It's always best to have the mixed fuel storage barrel outside at ambient temperature and to pump off the top, leaving the PHO and fats settled out at the bottom. Poly barrels are good for this because one can clearly see the solidified layer at the bottom and the clear fuel at the top.

The PHO and fats are not a problem with a heated two tank system. However, if one uses a heated two tank system then DO NOT use volatile solvents in the interior VO tank.

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Originally posted by john galt:if one uses a heated two tank system then DO NOT use volatile solvents in the interior VO tank.

What exactly is an Interior VO Tank?

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What exactly is an Interior VO tank?

Some installations have the VO tank in the vehicle trunk or in the van body.

I get it because of the fumes.

I've heard that you can add a little acetone to dissolve the animal fat. how well does that work.

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I've heard that you can add a little acetone to dissolve the animal fat. how well does that work.

Take a sample of your fuel blend and chill it in the freezer. If a layer of PHO & Fat settles out, then mark the top of the solid layer, add acetone, shake it up and repeat the test, then you will know if acetone has any effect on your fuel blend. The experience of others will have little or no benefit to determining what happens with your specific fuel blend, you have to test for yourself.

I use 25L plastic drums for my start and run tank and have a heated system. I have run Rug Blends on and off for 2 years and have never had any trouble with fumes or anything else.

My tanks don't get that warm from the return fuel to cause any significant amount of evaporation but I suppose if your running a bunch of electric heaters, a HOH line and some FPHE's thrown in for good measure, it could possibly be a problem running RUG.

All the passenger vehicles I have seen have vents from the cabin that go into the boot then exit somewhere so there is always a supply of moving air. as far as I am aware, this positive ventilation system has been a design standard for at least 30 years. Maybe US car makers didn't see a need for it?

Especially Using Dino, Kero or Bio, I don't see any problems or risk worth worrying about at all but people can and will make their own minds up.

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All the passenger vehicles I have seen have vents from the cabin that go into the boot then exit somewhere so there is always a supply of moving air.

Only when the vehicle is moving. Parking in a warm garage or on a hot summer day could cause problems with vapors from volatile solvents.

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Especially Using Dino, Kero or Bio, I don't see any problems or risk worth worrying about at all but people can and will make their own minds up.

The caution clearly stated VOLATILE solvents. People can make informed decisions only when they have the information.