Oil & Fuel Burning used motor oil?

[Elkins45]

Had a conversation with an old guy who told me he mixes all of his old motor oil with diesel and runs it in his older mechanically injected diesels?

Common practice? Dumb idea? He said he filters it first.

 

[Fawken]

I have used it to heat my shop in the winter, but it burns dirty and fouls the catalyst. Not sure I would ever have a diesel "older" enough where I would do that. Cleaning a catalytic element is bad enough- constantly cleaning injectors would be worse.

 

[aeblank]

Wouldn't catch me doing it. Ever.

 

[RalphVa]

Friend of mine who has a garage with he and his dad heats their garage in the winter with used oil dribbling onto the fire in his "wood" stove.

I used to sit old metal oil cans of used oil in one corner of our wood stove. Only problem is it stunk when the wood fire went out.

Ralph

 

[oosik]

I have a pail half full of old motor oil that I have my extra chains for my chainsaw soaking in. I've used it as chain saw lube oil but it tends to foul the system - so I don't do that any more.

Otherwise - I use as a starter when I burn slash piles in the fall. I took 30 gallons to a recycler but he wanted to charge me 50 cents/gallon. I just chuckled and brought it home.

 

[BHD]

at one time there was kit for over the road truckers that fed a bit of engine oil into the fuel tank, and replenished it with new oil (in theory) one would never have to change oil just the filter now and then, knew a trucker who used the system in his over the road trucks,

I do not do it, but did consider doing it during the oil Embargo 1970,s. even considered buying a special oil filtering machine,

 

[Mysfyt]

Worked for a trucking company that did this back in the 70's with no issues. Cummins mechanically injected engines back then.

 

[aeblank]

That is done in marine engines as well. The company I used to work for made timers for a company that made the system.
Engineered Machined Products : DNCO Oil Management System

This looks to be a display "board" showing tanks and hoses, filters, pumps, etc.

 

[jaotguy]

if the oil is dyno ( not synth) you can burn it in older diesels without problems ... the 10 micron filter will catch any "bits" before they reach the pump or injectors ... and it adds extra lube to the pump and injectors

you can also add fresh ashless oil (aero oil) directly to the tank and gain power ( as a cetane booster )

the engine will not know the difference BUT this WILL increase your pollution output

do not use synthetic oil ... it has a higher burn temp than regular diesel or dyno oil ....( it won't burn well )

do not use it if you have a CAT or exhaust cleaning system for particulates ...

 

[ultrarunner]

Thanks jaotguy for posting!

Had a neighbor with an old 1970 Mercedes 240D that would collect used motor oil, filter it and mix at a high rate of 33% with regular number 2 diesel...