240d Runs Fine On Used Motor Oil - Page 4 - PeachParts Mercedes-Benz Forum

jerryb · #46 02-22-2003, 12:55 PM

Cummins and others used to sell a machine to do this, it pumped the old oil out, filtered it and pumped fuel also to mix the two thouroly before pumping back into the tanks, about 6 gal to 300.
The old dark fuel we used to get in Mexico had more power than ours, and #2 has more power than #1 so I see no problem but 60% is a bit much, thats almost bunker fuel, and starting a 17 deg.?

bennett · #47 02-22-2003, 07:25 PM

Would this work to filter the oil?? .. uses a roll of toilet paper to filter it. I saw one of these in action and the guy took used diesel motor oil and ran it through the filter and it came out clean and clearm ( oil looked like new)

http://www.wefilterit.com/frantz_facts2.htm

bennett

P.E.Haiges · #48 05-16-2006, 12:54 PM

npnye,

And why wouldn't this ash, that is suspended in the oil as U say, not mix homogeniously with the other oil in the crankcase as the oil is sloshing around in the crankcase as the car is going over bumps, skidding around corners, rapid decelerations and jack rabbit starts and all the time being pumped throughout the engine?

Some ash may settle when the engine is stopped and allowed to cool but it is soon mixed with the oil as the oil heats and the car is driven.

P E H

jimnichols · #49 05-16-2006, 06:42 PM

my father worked in the Persian Gulf with ARAMACO in the 60's use to burn CRUDE OIL straight from the oil pipe line in pumping stations that were a strech logisticaly. Of course there were no metallic content to deal with that was the main reason that I did not try it as I work at a locomotive repair shop and have access to many gallons of used motor oil. The thing that stops me everytime is the metal that is picked up by the oil that no real filter process can remove short of redistillation. Jim

kitchenrat · #50 05-16-2006, 10:00 PM

the reason you're noticing an improvement in performance is due to the presence of gasoline in waste engine oil. a lot of gas gets past the rings on all gasoline engines. i'm no chemist but i know there are other products of cumbustion in the oil including water and the solids that accumulate and stuff up catalytic convertors.

nyko46 · #51 05-16-2006, 11:00 PM

Quote:

Originally Posted by wfdiesel

I have been fascinated with the idea of running my diesel on other alternate fuels besides that of Diesel which is now capping out at $1.69 per gallon. I work at an automotive dealership and have more than ample supply of used motor oil. I picked up a nice 240D with 74000 miles and have been increasing the amount of used motor oil to my mixture of diesel. Im currently running about 60% oil to diesel and while I dont really see why, it seems to run with a little more power the more oil i add. There has been no increase in smoke at all. It seems to fire off and go to a smooth idle a lot faster in cold weather. The coldest i have cranked in is 17 degrees. I make a 70 mile round trip daily to and from work is why i bought the car...might as well wear out an older car than a newer car... The $500 price tag wasnt that bad either, so being that I got it cheap, I feel justified in experimenting with it. What I would like to know is there anyone else out there supplementing fuel with used motor oil...if so what kind of ratios have you achieved? This summer I am going to try 100% used motor oil and see what happens. Comments?

We had almost the same idea.
On my 1982 - 300SD - Turbo Diesel I had mixed for few times used hydraulic oil when making oil changes in hydraulic systems of machines.But with me increase of mileage wasn't happen.Then I stop to do so.
I was reading about of the hydraulic oil and the article says that it is extremaly low flamable then I assume that this is the reason for mileage not changing with this mixing. I try also a used light lube oil but not passed through heating condition as motor oil.
The results was the same: Not difference in miles/galon.
Some comments?