The giant Caterpillar Diesel generators at work contain 110 gallons of Delo 400 15W 40 each. Every year the oil is changed with about 9 hours of running time on the oil. I have the guys set aside a 55 gallon drum for me to use in my beloved 85 300SD. Since I have plenty I usually change my oil every 2,000 miles or less. I change filters every other oil change. I initially tried it for 1,000 miles and sent in a sample for oil analysis as I was worried about the degradation of the additive package sitting in the generator for a year. My fears were completely unfounded as the oil test results came back absolutely perfect in every category. I know I can get Delo cheap at my local Auto Zone but even at $6 bucks a gallon I'm way ahead of the game and my Benz loves the attention. Comments please??

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Orland Park, IL
1985 300SD 215,000 miles

That is a hoot. You should have them save it all and then you would eventually be set for life. Or at least have enough for much higher mileage, especially if it ever begins to burn a little!!

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150

Billroc,

I see nothing wrong with what you are doing. You are also conserving resources.

And after the oil comes out of your engine you could filter it and use it for fuel by making maybe a 5% mixture with your Diesel fuel in warm weather.

P E H

The only downside of my many oil changes is taking the used stuff to my local garage to recycle it. If I could figure out a way to filter it, I think I would burn some in my car.

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Orland Park, IL
1985 300SD 215,000 miles

Please don't do that, here's why:

- Waste Vegatable oil comes from plants, which produce O2 as they grow, making carbon neutral as a fuel
- Engine Oil comes from petroleum, so the CO2 byproduct is not offset

- Waste Vegtable oil cannot lubricate your engine
- There is currently no easily available substitute for petroleum lubriation oil, so it should be recycled to minimize the amount of new oil needed from the ground.

Also, metal particles suspended in the oil, from what I've read, can only be eliminated through a centrifuge separation process, and you probably don't want to run them through your engine - much more dangerous than fat!

-Colin

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1981 240D
3.0L Turbo Swap, 4-spd
100% WVO hot filtered, under pressure, without filter bags. All those things that "can't be done".

1 - good points about petro v. bio-fuel (but dont forget that biodiesel is made with methanol, which is mainly produced from petro, and also requires lots of tractor miles when made from virgin soy which is what most large producers use because of the current regulatory benefits).

2 - Old300 - I dont know if I am more afraid of suspended metal particles in used eng oil damaging the IP, clogging the injectors, or entering the combustion chamber and scarring the cylinders and pistons? I dont hear anyone addressing anything except the IP...

Methanol is made from natural gas. At least it's not from crude. And it can be made from organic sources as well -- when the price of methane rises enough, it will be cost effective. Tractors can be fueled with biodiesel. The energy return is still 3x the inputs.

My previous point about filtering: You aren't getting any particles inside large enough to damage ANYTHING, let alone the relatively sloppy tolerances inside a cylinder. It's not like we are running a slurry, we are talking a few fine particles of lead and copper that will not harm steel. Do you know how small a micron is?

And most engine oil is not recycled, it is burned anyway. Lots of industrial buildings use waste oil heaters. New engine oil is just that: straight from the refinery.

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'83 240D with 617.952 and 2.88
'01 VW Beetle TDI
'05 Jeep Liberty CRD
'89 Toyota 4x4, needs 2L-T
'78 280Z with L28ET - 12.86@110
Oil Burner Kartel #35

http://i16.photobucket.com/albums/b1...oD/bioclip.jpg

the germans named our motors om617 and the om stands
for oil motor.....

actually you would be better off running your 300 sd on old used filtered
oil from the jiffy lube then you would be running 100% biodiesel... because
the bio methonal will eat up the lines and seals.... where as the used oil
might have a few particles of lead or dirt or something that would be filtered
out...

Plus, our engines were designed to run on diesel fuel, not diesel fuel with used motor oil. That's good enough reason right there for me there not to mix it in my fuel.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

Horse. Poo. Everything is "carbon neutral" where do you think petroleum comes from?

OM Oel Motor. Rudolf Diesel designed his engine to run on Peanut oil. Diesel came later. B100 is just fine. SVO when heated to 180+ and done right is probably ok as well but you wont catch me doing it (soy is $7 a gal now?).

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

But Rudolf didn't work at Mercedes did he?

billrok,

P.E. just told you a way.

I would first filter it through a very fine filter. There is a huge sock filter that you can buy at the bio diesel website that would work great for this.

Good luck,

Larry--Last summer after consulting with whunter about it I began filtering waste oil through an old Lubrifiner from a junked out semi-truck. I've been burning it in my farm tractors at 10% to 20% with good luck. My farm tractors are indirect injection. I have noticed that the engines are quieter (less diesel knock). Power has remained the same although they do smoke a skosh more.

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1983 300-D turbo
1985 300-D turbo
1959 Harley Panhead chopper
1929 Ford coupe restored
I hang out with Boneheaddoctor at Schuman Automotive OBK#5
All liberals are mattoids but not all mattoids are liberal.

I don't understand what the attraction is for some people to try and burn anything they can think of inside their engines. I won't even dump used oil in my beater SD. Because I don't have the time or will to deal with problems if they develope, and I don't want to mess with nasty old oil.

Pumping diesel fuel is enough of a hassle, I hate how the pumps are always covered in fuel.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Running used motor oil, filtered or not, in your fuel tank in large quantities is not necessarily a good thing to do. At least not to a car you care about. I have a VW Dasher Diesel beater that I wouldn't think twice about feeding used/filtered oil as fuel, but I'd never put it in my MB. There are fine particles that you can't filter out, which don't do nice things to injection pumps and injectors at 2000psi. It's up to you, though. BTW, I think re-using the 9-hour Delo in your crankcase is fantastic!

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