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WMO How to thread

138533 Views 203 Replies 63 Participants Last post by  conway.johnmichael
First some acronyms

WMO: waste motor oil

WATF: waste transmission fluid

RUG: regular unleaded gasoline

D2: pump diesel

W85: approximately 85% WMO to 15% RUG blend. Some users add 15% RUG to the WMO
such as 40 gallons WMO and 6 gallons RUG which is actually 87/13 or others
calculate by dividing the WMO amount by 0.85 to determine how much RUG to add
such as 40/0.85=47 so they add 7 gallons RUG for a 85/15 batch

Some other definitions:

Whole house water filter: This is a 10" cartridge filter housing available at
most hardware stores.

String wound filter: these are typically 10" cartridges that fit the above
housing. They are available at commercial supply houses such as McMaster-Carr
or Grainger Industrial Supply or elsewhere online. String wound cartridges are
nominal rated meaning they don't get all particles above their rating out.
Typically when using these several passes are made or the oil is recirculated
through them.

Absolute rated filter: These filters get about 99.9 percent of particles larger
than their rating out. They are more costly and normally have a lower flow rate
so they are normally used at the end of the process

Upflow processor: A 55 gallon drum set up to separate water and heavy
particulate from the WMO. Most include a drain valve in the bottom, typically a
pipe welded into the bottom side of the drum with a valve. The top of the drum
is sealed. The small bung has an 3/4" NPT elbow installed, then a ball valve and
a filter housing typically containing a 20 micron string wound filter. The
output of the filter has a hose barb and normally a 3/8" hose. This would lead
to a mixing drum. The larger bung has a 2" close pipe nipple. Inside this nipple
a length of 2" exhaust pipe is welded that extends down to about 6-8" from the
bottom of the drum when the nipple is threaded in. Next the top third of a
closed head drum is cut off and flipped over then threaded onto the 2" pipe
nipple forming a sort of funnel. This will hold about 20 gallons of oil. Here is
how the process works: First the barrel needs to be completely filled through
the funnel and all the air let out through the 3/4" ball valve then it should
sit at least 1-2 weeks. To operate the system fill the funnel with 20 gallons of
oil. Open the valve slightly until a very light drizzle of oil comes out of the
3/8" hose. Ideally it will take about a day and a half for all the oil to empty
out of the funnel. The flow slows down as the funnel empties. Since I make 40 +
7 gallon batches I continue adding my other 20 gallons of WMO as the funnel
empties. Once all the oil has emptied from the funnel into the drum and forced
clean dry oil out through the filter you may close the valve until the next time
you need to process oil. Periodically you should open the bottom drain and draw
off any water and sludge that is present, failure to do this will eventually
result in a barrel full of water and sludge.

Mixing barrel: There are several ways to do this. If you can weld I have found
the nicest setup to be a 3/4" pipe welded into the bottom side of the barrel
about 1/2" up from the bottom. Put a 3/4" ball valve on the pipe then a few
elbows and a 12-15" length of pipe to bring the pipe high enough to screw on a
filter housing. I have two filter housings in series each with a 5 micron string
wound filter. After the filters I attach my mixing pump. Mine is a gear pump
that is geared down to do about 3 gallons per minute (gpm) which is the max
rating of my string wound filters. If your pump will not pull through the
filters then you may try pushing instead, just be careful not to create too much
pressure especially if your pump is large. You want to either filter in a vacuum
(pulling) or under very little pressure so the filters catch as much particulate
as possible. Too much pressure will force particulate past the filters. The
output of my pump has a tee fitting with a valve on each side. One side goes
back into the mix barrel. The idea is to recirculate and mix the oil. My method
is to add my RUG to the barrel first then let my upflow drizzle in 40 gallons
over a couple of days. Once this is complete I stir with a wooden paddle then
turn on my pump for about 3 hours. In three hours roughly 180 gallons of mix has
gone through my filters. After recirculating I close the valve that goes back
into the drum and open the valve on the other side of the tee fitting. This
leads to a 5 micron absolute rated cartridge. I pump through this either into
storage or into my truck.

drmiller100 has a different "low buck" method that I will do my best to describe
here: He uses just a mixing drum, adds his WMO and RUG and mixes it up then lets
it settle for a day to two. He then uses a pump to pull the crud and water off
the bottom of his mix barrel. Next using a small diaphragm pump he recirculates
through two 5 micron cartridges and then through a spin on absolute rated fuel
filter and into his truck or storage.

I don't think either system is better than the other as both drmiller100 and
myself have had good luck with our respective systems. I will only say that with
the pre-settling and upflow processor I have never had an issue with water in my
fuel. My recommendation to novices using drmiller100's setup would be to add a
water block or water separator filter inline as a precaution.

Another method is to use a centrifuge such as a Dieselcraft. I won't get into
the details here but suffice it to say that centrifuging is essentially forced
settling using the g-force created by the spinning centrifuge bowl. I prefer the
cheap and easy method of just regular settling and filtering.
Here are some ideas I've found helpful. I like to pre-settle my oil for at least
a month before processing. What I did originally was weld some 3/4" pipes into
the bottom sides of 3 55 gallon closed top barrels. I put my collected oil in
these barrels and date them with marker on masking tape. Since my processing has
grown I now use a 275 gallon fuel oil tank for storage and pre-settling. I
always draw off the top of the settling barrels. On my tank I put a tap at the
54 gallon mark and draw from there. From time to time open the bottom valves on
the barrels to drain off any water and sludge you may find. I have found that
letting the oil settle this long really gets a lot of the junk out prior to
upflow processing and filtering. Another thing some of us have found is that
after mixing the RUG and WMO together if we let the mix sit for a day or two the
RUG causes more sludge to drop out of suspension. That is one of the reasons I
start with RUG in my mix barrel and then let the upflow slowly fill it. It is
also important to carry spare fuel filters, the tools to change them, and about
a quart of fuel with you, especially at first. We believe that something in the
oil cleans the inside of the tanks and fuel systems because normally when first
starting out you will plug 1-3 filters in the first 500 miles or less. Once the
crud is out of the tanks the onboard filters seem to last a rather long time but
it is still good practice to carry a spare filter and some fuel to fill it.

Many of us are running the W85 blend but consider this a starting point. A lot
depends upon the oil you collect, thicker oil will require more RUG to thin it
out while thin oils like WATF require less, sometimes as little as 10% RUG. I
have found that my W85 starts and runs well down to about 10F, below that I have
added about 10% D2 to thin it a little more but next winter I'll likely just add
5% RUG instead since I did try that successfully in the past few weeks.

I feel I must strongly urge anyone interested in getting into any alternative
fuel to get to know their vehicle on D2 for at least a month or two before
experimenting with alternative fuels. Also make sure everything is in working
order. There are several reasons for this. Mainly the naysayers will almost
always blame your fuel choice if your vehicle breaks down. The second big reason
is you want to know how your vehicle should start cold and drive on D2 so that
you can properly adjust your fuel. Properly blended WMO is indistinquishble from
D2 other than slightly quieter running (less diesel knock). Another
recommendation is to install a dash mounted pressure gauge after the fuel
filter. On amy IDI I just used a 15psi boost gauge and some nylon gauge tubing.
This lets me closely monitor my filter condition as well as how well my blend is
flowing at low temps so I can adjust accordingly. I find the first sign that the
filter is clogging is if the pressure drops a little during hard acceleration,
like 1-2 psi on the IDI. My truck drops 1/2 psi under hard acceleration with a
fresh filter regardless of fuel or temperature so that is my baseline. If you
are running an engine equipped with a Stanadyne DB2 injection pump DO NOT let
the pressure drop below 4psi, this will eventually kill the transfer pump
section of the pump because it will cause it to cavitate. This is why I highly
recommend the pressure gauge for the IDI trucks.

Well there it is, just about everything I know about running WMO in my vehicle
as well as what I have learned from others. Hopefully some of the other forum
members will chime in with some stuff I may have missed.
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Hi! I am looking for a blend to use in a 6.2 I ran it about 400 miles on 50/50 WMO and D2 on a trip, but the transmission went out (nearly) and so I limped back home after topping the tank off with D2. The trans in finally fixed, and I just replaced the IP and inkectors. It was running really bad even before the WMO, though it seemed to run about the same on it as it did on D2 before ( I really couldn't say but it may have been slightly better even. FWIW, this was August in Tx with temps way in the triple digits.) I didn't realize how bad it was until now. Power is easily double. Right now, I have about 100 +- gal of oil and about 25 gal of WATF.About half of the oil and all the ATF has been filtered and run numerous passes through a centrifuge. The atf was also heated for a long time to hopefully remove any water. I saw several mentions of 85/15 and 80/20 WMO/RUG. Yesterday I tried such a mix- One gal RUG, about 3.5 gal WMO, and about .5 gal atf. Put it in another 6.2 that was nearly empty and fired it up. I haven't driven it yet. but it sounds about the same, but it smokes A LOT. I think the injectors are bad in this one also, as it doen't have the power of a 4 cylinder. I am going to try a similar batch in the other with the new pump and injectors. I don't mind using 50/50 if I have to, but obviously, a heavier blend would be nice, if I could get by without too much smoke, or risk of fouling my injectors in a short time. I am going to try to get more atf and less oil in the future, but that is easier said than done. Any advice on blending WMO, WATF, RUG and D2 will be greatly appreciated. Thanks ,
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Hi! Thanks for the reply. The WATF I have already has about 10%RUG and has settled and then centrifuged. I ran the CF for over 5 hrs straight (left and forgot and left it running). I will check in the morning and see how much it picked up. does the amount of RUG affect the amount or rate of contaminants settling out. About 40 gal of my WMO that has been CF'ed has had some RUG added ti it afterwards- but only like 2 gal or so. I guess add some more gas and let it sit a day or two pump the ATF out into a separate clean drum, and pump the WMO back into the CF barrel and run itthrough the CF again. Correct? I am still curious and concerned with the amount of smoke the other 6.2 made with about 80/20. I'll try 5 gal of 80/20 in the other with the new pump and injectors and see how much it smokes. If it is too smokey, I add more RUG, up to 35%? Thanks again and I'lleep you posted about the results, and I'll probably have more questions too. Larry
6.2 injectors

Hi! I had posted here a while back about WMO in a 6.2, and remember discussing it with Jeffrey Brooks and others. I have been fighting this 6.2 for a while now. As I recall, it was running fair, but fairly low on power so back in the fall I installed rebuilt injectors and pump, and very recently a timing chain. It has a lope at idle and seems like a miss at all speeds and smokes. Actually immediately after replacing the injectors and pump I do not remember how it ran, but since then I have run nearly a full aux tank- maybe 40 or so gallons- of WMO and about 20% RUG. I just got through making an injector pop tester using a portapower pump. I just pulled the injectors from one side and the opening in the end which is supposed to be about 1/8-3/16 inch, just guessing, is nearly shut with black carbon. All four popped at about 1800-1900 PSI and seemed to hold pressure and not drip, but they just seemed to shoot out a straight stream, and from what I have seen and heard, it is supposed to be nearer to a mist than a stream. Is that correct or not? One thing- I am using the fluid that came in the pump(I bought the whole portapower kit from a pawn shop. I swear it doesn't look like it was ever used) Of course I guess the injectors shot the WMO mix the first several pops from what was still in them. My questions:: should the spray be close to a mist/will using Diesel in the tester make much of a difference--the fluid in it is not that thick, but it is definitely thicker that Diesel, and the tester has been outside at about 45 degrees/ what is the best way to clean the tips of the injectors/ obviously this engine does not like 80/20, so do you think running a 50/50 mix of the 80/20 and Diesel will give a reasonable time between injector cleanings. This is a N/A engine in a 3/4 ton p/u, so pulling the injectors is not really that hard, but I would like to get at least 5K between cleanings.I need to get the other four injectors out and test them and clean all of them, and then pray that solves my problems with the way it runs. I tested the compression several times and can't see much wrong there, and cracking the injector lines one at a time did not show anything-- did that about 4 different times. If this doesn't do it, next step is pulling the heads. I had the valve covers off and everything looked ok--needed new gaskets anyway. I'll check the valve trian carefully again before I pull heads though. Any comments/suggestions etc. will be greatly appreciated.
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Cleaning 6.2 injectors

I have been running various blends of WMO, WATF, RUG and D2 and have had my injectors coke up badly, twice, after ~1000 miles. Of course I prefer WATF, but unfortunately so far I haven't been able to get enough. The truck was smoking pretty bad, but I think a lot of that was from the coked injectors. I cleaned them yesterday and drove it last night-- it runs MUCH better, but I cant really tell about the smoke. It looked like a fair amount looking in the mirror with car lights behind me, but I will try it in the daylight today and see. Also, the truck has a single exhaust, so with all the exhaust coming out of the passenger side, it probably looks worse than it would be with the same amount coming out of each side. I have heard about turpentine and all kinds of things as additives, but any advice will be appreciated. Also, anybody know of an easy way to dissolve/soften the carbon on the injectors. I bought a gallon of Berryman "carb cleaner" that the guy at OReilly's assured me was the same as the old carb cleaner. $30 after tax, and a $1 bottle of dish soap would have done more good. Not that it will do any good, but tomorrow I am going to complain to Berryman and OReillys both. The stuff was totally worthless and OReillys said TFB. I will never buy anything from them again. I tried about everything I could think of including oven cleaner.Also, the glow plugs were covered with a brown ash/residue and I cleaned them too. If I could get it to go 5k between cleanings I would be satisfied-- they are not hard to pull out. Advice?? Thanks!!
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What are you all paying for K1? I havent bought any in quite a while, but around here it is not that easy to find, and as I recall when you did find some, it was at least double what D2 was.
After wanting one for about 20 years, I am finally getting a 12 valve Cummins-1995 with about 175K on it. Right now I am just stockpiling all my WATF while Diesel is comparatively cheap. I know it is not going to stay down forever. Question is--how do those engines like WMO? To be specific, when I was running it ,it was mostly WATF with about 20% rug, then that about 50/50 with D2. At that rate, for one thing, my supply and usage were about equal. Anything I should know about the Cummins? Thanks I was going to put a tranny in the 6.2, and add a turbo, but for now am not going to do anything with it for a while-- after I retire and move, may have time and desire to mess with it.
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