Yes; I mostly agree.

The 50% efficiency of a 10 nominal micron Filter seems to rely on the Fact that most of the time the Fuel is going to be clean.
The next thing is that most of the Fuel does not go through the Fuel Injection part of the Fuel Injection Pump but is recalculated back to the Fuel Tank.
This means that most of the Fuel inside of the Fuel Tank is going to pass through the 50% efficiency Filter many many times. If each time the Fuel passes through the Filter 50% of the 10 micron and larger particles are filtered out eventually the Fuel in the Tank will only have 10 micron and smaller particles.
If you over load the system with a massive amount of 10 micron and larger particles it is going to cause abnormal wear on you Fuel Injection System.

The above is one of the reasons I have a 2 absolute Micron Spin-on CAT Filter in my Fuel System replacing my Stock Mercedes Spin-on Filter.

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84 300D, 82 Volvo 244Gl Diesel

I add half a quart of new cheap engine oil to the tank when i fill up.
Hope to lubricate the IP with it.
Reading this thread makes me wonder.
What do the experts think?

Thanks for your advice.

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76 240 D. Bought in 1998 for $25.
85 300D. Got it for free with a bad engine. ( Sold )
60 Unimog 404. What was left of it, was given to me. Now powerd by 617A.
88 560 SEL. Bought without engine and trans. Now powerd by 617A.
67 250 SE. Cuope. For resto or sale.
64 220SE. For resto.

not a bad idea, but wrong oil and too much of it.

you want ashless 2 cycle oil. and about a cup. They sell it really small bottles, treat them as one shot.

I know a few old time diesel mechanics that swear by it. I have never tried it however, I think I should. .

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87' 300DT (Grey w/ red leather)
87' 300TDT (silver w/ palamino tex) SOLD

2012 VW JSW TDI (on tdiclub.com all the time "btcost")

Well you've heard of one now (raises hand) .

Not so much lately, but a year or two ago Mercedes diesels were popping up on Craigslist all over the US with the words "needs tuneup" in the ad... and mention of running WVO.

If you meant you don't hear stories on this list, well that doesn't surprise me as most of the people who hang out on car forums know enough to use experimental fuels with at least a gram of common sense. It's the poor folks who believe the Lovecrap et al., aka the thieves of the WVO movement, who get burned.

Back to my case: In 2005 I purchased a 240d from a guy in NY State who had experimented with WVO without any additional filtration or heat. I am not precisely sure how long it took him to polymerize the rings, but when I got the car it was blowing lots of oily smoke -- but still ran quite well.

I had purchased it as a parts car but it was in better shape than I expected, so I decided to try and resuscitate the rings. I drove it at quiet times (cop shift change hours) on backroads with all sorts of additives in the crankcase and in the fuel (even a bit of varsol down the intake) and, lo and behold, over a few weeks of this it cleared up quite a bit.

So I fixed it up, got it inspected (no pollution test except gross smoke here in QC) and drove it for about five months until suddenly it started to miss badly on #3 and began to smoke again when hot. Three guys with solid Mercedes experience suggested it was a damaged valve, probably from carbonization related to the WVO.

Eventually I pulled the head and OOPS the head was/is pristine, looks like someone did the valves somewhere along the way.

I was not motivated or equipped to pull apart an OM616 so I parked it and looked for a used motor... and looked.... and looked. Nada turned up here in Canada. Not even a decent 617 drivetrain could be found.

Sadly I ended up junking it last fall. It hurt as I really liked that car.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

CLEAN oil should pose no problems (1/2 quart is a bit overkill though), and actually improve both power, and lubricity. Biodiesel also works wonders, but REALLY CLEANS THINGS OUT!!!
2cycle oil is great for this, and in the gallon jugs, it's REALLY cheap. MANY MANY MANY diesel drivers out there add a lubricant to the fuel. anything built before 2007 was designed for use with a much slicker fuel than is available today, so it's not a bad thing.
I've never done it, I just pump in fuel, and drive... but I'm not opposed to using a new oil in the fuel as an additive.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

FWIW, on four occasions over the past five years, I've added one gallon of used oil to a full tank of diesel on a couple of my 240Ds. One of those gallons was from the hydrostatic tranny of a friend's Kubota tractor, while the other three were from my gasser car with substatial freeway mileage. (I won't burn that black, sooty, used oil from my diesels)
Only problem I ran into one time was premature clogging of the pre-filter in my automatic 240D from some junk that had gotten in the jug I used to collect the used oil.

OTOH, last fall I added a gallon of used oil to top-off the tank of my stickshift 240D. The previous summer I had noticed pinging under part hrottle in that car, but it has dissappeared since that one tank of oil-added diesel.

I'm not that worried about an occasional gallon of used gasser-oil added to a tankfull of diesel on these cars. Most of the engine/injection problems I've heard about here seem to have resulted rom problems with waste veggie oil.

Happy Motoring, Mark

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DrDKW

Burning used oil in a furnace still sends all the heavy metal contaminants into the air. Don't worry, not preaching, I burn it in my garage furnace!

I burned used motor oil in my last car, as well as WVO, as well as ATF, or a combination of all the above, as well as anything else I could find for free, anything to not have to burn diesel! Although the car was a junker and only drove for a year before scrapping, never had ill effects from the various cocktails floating around the fuel tank. I wouldn't do it to my SD or recomend it, just reporting. (the fumes from my exhaust would burn your eyes)

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1982 300sd, new project car to restore

It doesn't matter if you know what you're doing, as long as you look like you know what you're doing.

Reading this brought me to the realization that i don't fully understand how fuel filters are rated. Up until this moment i was under the impression my filter (a 10 micron one) would filter all particles 10 microns and over from the fuel. your post now has me questioning my understanding. It would be awesome if you could go into more detail.



and on another note, its pretty clear to me now that what i did was not the smartest idea. there are bad ways of burning alternate fuels, and there are less bad ways of doing it. and for the purposes of this thread, which is not an alternate fuel thread. lets leave it at that. please take your heated anti WVO, WMO, etc. posts elsewhere. thank you.

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Current
2006 E320 CDI, 57K bought at 67K "Liesl"
1986 190E 2.3-16, 198K bought at 56K "Brigitta"
1987 300TD (Chuggin Along), 292K "Friedrich"
1995 E320 Wagon, 200K "Louisa"

Past
1987 300SDL, (sold) 125K, bought for 1$ "Kurt"

there are bad ways of burning alternate fuels, and there are less bad ways of doing it. and for the purposes of this thread, which is not an alternate fuel thread. lets leave it at that. please take your heated anti WVO, WMO, etc. posts elsewhere. thank you.[/QUOTE]

AMEN to that brother!!

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2012 Mercedes ML350 Bluetec 102K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 238K (mine)
1998 Volvo S70 T5 Turbo 211K (kids)
1994 Ford F150 4WD 246K (firewood hauler)
1983 Mercedes 300D 384K (diesel commuter)

Oh why, oh why. What's the matter with fresh diesel fuel, or B20 at the pump?

Opti-Lube is a terrific fuel lubricant that will improve starts, cut exhaust smoke, and keep the system clean. Used motor oil? Or even new motor oil? OMG. The WVO burners I've driven behind stink the worst of any exhaust I have ever had the pleasure of experiencing in my life. It smells like burning plastic. My understanding is the glycerin doesn't burn, so it has to go somewhere. Into the motor oil, out the exhaust? Where? It's been said it really gums up a motor.

I cannot imagine treating my precious little car like this. Just blows my mind. I think y'all are nuts for pouring anything but fuel into your fuel tank. But whatever, it's your car. No thanks for any of it. I have better things to do.

Flame suit on.

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Chris Brown
"OC", So-Cal
1979 240D, 122K, 4spd, Colorado Biege w/Tobacco, Pwr Roof, AC, Cruise, Becker Corona - SOLD
Past Benzos: 71 250 • 83 240D • 84 190E • 04 C240 • 11 GLK350 • 13 c250 Coupe
http://www.peachparts.com/shopforum/...ine=1276896801

This is interesting. Can you provide a part number?

Are CAT filters CAT-dealer-only items?

Thanks

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

The Filter is
CAT 1R-0750 Fuel Filter (next best and cheaper and maybe more available is the Baldwin BF7633).
I bought the CAT and Baldwin Filters off of eBay. Truck supply stores may sell them.

The below thread covers the details of 2 different filter mods. My CAT Filter mod (I had to use the inferior WIX Filter due to availability to get the project going) and a Mod that Deliveryvalve though up.

Lower than 10 Micron Fuel Filter Mod pics
http://www.peachparts.com/shopforum/diesel-discussion/225004-lower-micron-fuel-filter-mod.html

Attached Thumbnails

 

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84 300D, 82 Volvo 244Gl Diesel

It is better you do an internet search and see for yourself.

There is the older "nominal micron rating"; find the definition for that and then look up what an “Absolute rating is” and then see the definition of the newer "Beta Rating“.

Another side line is you will find on an Air Filter Box it will claim it filter out 99% (of something) but will not give you any sort of Micron level of Filteration the Air Filter will filter down to.

Industrial Air Filter sometimes list the Micron level they Filter down to but not Filters used on Cars.

I remember the old days when I changed a Filter and thought I was doing OK. Now I would like to know more.

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84 300D, 82 Volvo 244Gl Diesel

There is a guy with a Cummins forum that posted pics of injectors run on oil & another set run on ashless 2-stroke. The 2-stroke injectors were fine. Others weren't. I use 1 oz ashless 2-stroke/gallon of fuel in my 24V Cummins. SD injection pump isn't as particular as the Cummins VP44. Our fuel used to be so greasy that Mercedes supplied plastic gloves with the car.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.