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  • Oil Check

    I'll tell you what your are seeing, then YOU can tell ME what we are seeing (I Hope)...


    Both oil samples are essentially from the same source(s). 85% oil I know about (from work), 15% "gimmie" oil from reasonably trusted sources.


    Oil in RIGHT has been centrifuged (simple centrifuge) twice and let settle for a month or more.

    Oil on LEFT was my first attempt at mist washing. It turned it into a horrible emulsion, but then I heat settled until the crud dropped, drained it, and then centrifuged twice as well. It is certainly a lot lighter in color but still has a distinct haze. I am not concerned about the creamy at the bottom that is the hydrogenated portion of the PHO oil my source uses. I AM very concerned about the haze though.

    more pics:





    I have not hot pan tested either source. I am not sure how much I trust my analysis judgment on hot pan test having never done it. The few YouTube videos I watched of it were poor quality and not very helpful.

    Not sure what all this adds up to, except that the more I screw around trying to perfect my filtering system, the worse off I seem to be doing. That dark oil is so clear and all I did was chuck it in a barrel, pressurize it, and shoot it through my centi nice and slow. That mist washed sample scares the heck out of me!!

    Oh, the one other difference I can think of is that the dark/clear sample was pushed nice and gentle through the centrifuge using an air operated barrel pump. It only pushed what the centrifuge feed valve required/allowed. The light hazy sample was pushed violently through using a 1” clear water pump with the bulk of the oil (the bypass volume that the centi coulend take) circulating back into the mist tank. Come to think of it, I am starting to think this may be the culprit. That violent mixing is certainly what caused my emulsion to begin with.

    Please advise.
    2005 F350 Harley: Heat Induction Hood, ARE Bed Cover, DashHawk, MBRP turbo back, cat delete, SCT: Tunes by Spartan, Exhaust Sound Videos HERE

  • #2
    I think you answered your own question. I think running it through the pump with so much water in it caused the emulsion. Over the next few days, it might clear up more. Maybe.
    Elvia the HandyMan
    2000 F350 7.3 XL Dually utility/service truck
    V3 March 2008

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    • #3
      So whats wrong with the oil on the right that requires you to mist wash it?
      2002 F250 7.3

      If it walks like a duck.....

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      • #4
        Originally posted by Allofus123 View Post
        So whats wrong with the oil on the right that requires you to mist wash it?
        I got a confirmed batch of boil-out in last weeks collection from a friend. A whole gallon of wash water went into my 50 gallon drum. I ended up tossing out about 45 gallons of otherwise terrific oil. I have since stopped accepting "charity oil". I have a lot of kind friends that offer to give me oil they have "collected" but it is not their injectors we are talking about so I will stick with oil I know. Since that event though I have been obsessing about tainted oil and, upon suggestion (Clay ) I decided to try my hand at mist washing. - UG not sure I am going to do that again. At least not in combination with the clear water pump.
        Last edited by FastCote; 08-25-2008, 03:41 AM.
        2005 F350 Harley: Heat Induction Hood, ARE Bed Cover, DashHawk, MBRP turbo back, cat delete, SCT: Tunes by Spartan, Exhaust Sound Videos HERE

        Comment


        • #5
          Originally posted by FastCote View Post
          I got a confirmed batch of boil-out in last weeks collection from a friend. A whole gallon of wash water went into my 50 gallon drum. I ended up tossing out about 45 gallons of otherwise terrific oil. I have since stopped accepting "charity oil". I have a lot of kind friends that offer to give me oil they have "collected" but it is not their injectors we are talking about so I will stick with oil I know. Since that event though I have been obsessing about tainted oil and, upon suggestion (Clay ) I decided to try my hand at mist washing. - UG not sure I am going to do that again. At least not in combination with the clear water pump.
          Got ya. I understood from your original post that this oil was from a trusted source so it seemed like a lot of "extra" work to mist wash.
          2002 F250 7.3

          If it walks like a duck.....

          Comment


          • #6
            What would be the advantage of mist washing over just running it through your centrifuge?
            2001 F250 Crew Cab V3 Conversion

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            • #7
              Originally posted by waytallwhitey View Post
              What would be the advantage of mist washing over just running it through your centrifuge?
              The centrifuge will not take "boil out" out of the oil. I believe mistwashing will if done correctly.

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              • #8
                After thinking about it... If there is really no way to test if boil-out is present in the oil, then how would you know if the mist washing did what it was supposed to do? Maybe I have missed something, but shy of sending the final product to a lab, has there been a proven home experiment performed that will detect boil out?

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                • #9
                  mist washing removes the crud and lye from bio-D when home brewing so i would think its safe to assume that it will also remove it from the oil. A litmus paper test can then be done on the water after it is settled out.

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                  • #10
                    so you would have to wash, settle, test, and repeat until the water showed no traces of the chemicals?

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                    • #11
                      Originally posted by Hooter View Post
                      so you would have to wash, settle, test, and repeat until the water showed no traces of the chemicals?
                      I'm not the one to ask about washing...i haven't done it, only talked to several who have.

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                      • #12
                        Originally posted by FastCote View Post
                        I got a confirmed batch of boil-out in last weeks collection from a friend. A whole gallon of wash water went into my 50 gallon drum. I ended up tossing out about 45 gallons of otherwise terrific oil. I have since stopped accepting "charity oil". I have a lot of kind friends that offer to give me oil they have "collected" but it is not their injectors we are talking about so I will stick with oil I know. Since that event though I have been obsessing about tainted oil and, upon suggestion (Clay ) I decided to try my hand at mist washing. - UG not sure I am going to do that again. At least not in combination with the clear water pump.
                        FastCote,

                        Could you elaborate a bit on what "boil-out" is? Also, If I mix some oil with water and let it settle and then test the PH of the water, what are acceptable values? Thanks - Patrick

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                        • #13
                          Originally posted by lancaster,pa View Post
                          FastCote,

                          Could you elaborate a bit on what "boil-out" is? Also, If I mix some oil with water and let it settle and then test the PH of the water, what are acceptable values? Thanks - Patrick
                          Boil-out is an industrial cleaner that some places use to clean their fryer. It is a lye-based product that I assume you mix with water and heat in the fryer to “boil out” the crud.

                          You are supposed to flush it down the drain when you are done. Trouble is some people chuck it in with the waste oil ‘cause they are lazy, careless, malicious, or otherwise ignorant of the damage that it causes.

                          Ask Clay – It ate up a set of his injectors in a New York minute! I was lucky (so far) in that one entire jug that I got was totally wash water but it was immediately obvious because it was the blue-white color of skim milk. It was also too late because I up-ended it into my drum, but at least I noticed it. If it were mixed in a larger sample of oil I would have missed it.

                          I am not the right guy to say how to detect it. There are many opinions on how to test. Jason and Clay told me to put a sample of oil and water in a plastic water bottle, heat it in a microwave, put the cap on it, take it OUTSIDE and shake the heck out of it. If there is lye in there it will react violently possibly even blowing the cap off. When I tossed my 50 gallons of tainted oil using my pressurized sucker tank it actually SMOKED coming out!

                          I can tell you that the worry of contaminated oil, combined with the hassle of mist washing definitely makes me more selective about the oil I collect.
                          2005 F350 Harley: Heat Induction Hood, ARE Bed Cover, DashHawk, MBRP turbo back, cat delete, SCT: Tunes by Spartan, Exhaust Sound Videos HERE

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                          • #14
                            FastCote,

                            Thanks for the info. - Patrick

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                            • #15
                              Originally posted by FastCote View Post
                              Jason and Clay told me to put a sample of oil and water in a plastic water bottle, heat it in a microwave, put the cap on it, take it OUTSIDE and shake the heck out of it. If there is lye in there it will react violently possibly even blowing the cap off.
                              Did Jason tell you to heat it in the microwave? I didn't...just add tap water...hot tap water...doesn't have to be boiling hot, just bathtub hot.

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