Dalton Gang

I have been dumping my old oil back into my tank anfter the change for approx 8 months now. No problems. Anyone else silly in the head like me? Anyone else do this and have problems associated with it?

Bearfoot2

Wouldn't think of it. : : The reason for draining it from the crankcase is because of the dirt, sludge, minute metal particles and other contaminants. :

I don't want all that stuff in my fuel, fuel tank, fuel lines, lift pump, fuel filter, PE144, injectors, valves, or cylinders. Think the fuel filter will get it all out? ??? Why not just change oil filters and leave it in the crankcase? ??? Besides it gets to the lift pump before the filter and there is already enough lift pump problems. > >

I buy my fuel from large truck stops that use filters in order to get clean fuel in my tank. Why would I want to put that filty junk in? ???

No, Thanks Stan

Bearfoot2

P.S. I'm trying for 500k on my truck. I don't think that is the way to get it. There are many things that won't cause a problem in 8 months but will break down a $40k truck before it's time.

Stan

bulabula

I don't. But,

Cummins sells a purifier to recycle engine oil for combustion. I thought it was aimed towards the large truck fleet operators to help save some costs in oily waste disposal charges.

Theres a Cummins web page somewhere that discusses this, but I don't have it on this computer; and I put it in a previous thread somewhere. Can't remember the mix ratios, buts its something like 5%.

I think if you put that oil in a settling tank and let the particulates settle out, then drain it a couple inches off the bottom, before dumping it in the tank, you'd be better off.

I prefer to recycle my old oil at the county dump, but to each his own.

CoastalDav

Its common practice in the Marine Industry to burn old lube oil via the fuel system, but its done differant than just putting it in the fuel tank. It goes to a waste oil tank first and is filtered before the porportioner lets it into the fuel system.
The cost of disposal is the driving force for doing this.

Many of the Crew/Supply Boats in the oil field have as many as 6 engines. So you can see the problem.

Filtered, I can see nothing wrong with using it in the fuel.
After all, if you look in your owners manual, it will tell you to add lube oil to your fuel if your forced to use Kerosene or some other dry type fuel.

Dave

thatguy

Rollins Truck Leasing used to blend their used oil in with their diesel fuel.. I asked around and no one knew of a reason why you couldnt burn it that way.. BUT as Bearfoot2 mentioned I would think you would want to filter it pretty good to get any contaminants out..

By dumping it in a bulk fuel storage tank a lot of the stuff would sink to the bottom anyway..

In actuallality you may also need to pay state (if not federal) taxes on it, since it is now being used as a highway fuel..

You may have some explaining to do if they ever test your tanks for dyed/off road fuel.. I would think the used oil would give the clear fuel a dark tint that could make them suspicious..

Dalton Gang

I was also informed by Cummins that you could safely burn two gallons of used oil per tankful, as long as it isnt sludged up and is filtered. I have heard that you could safely burn 3 gallons per tank, but it might smoke a little. I aint skeered. If it were a Duramax I would be mighty skeered about it.

I PASS GAS

What about oil from gassers? I haven't got the truck yet, but I like the sounds of this--free (sort of) fuel. I also change the oil in my parent's car, my girlfriend's, sometimes her parent's, and my grandparent's cars--all gassers. Lets just say you were going to do this, would the fact that the oil came from a gasser make a difference. Of course none of these are old ragged out cars that have a bad set of rings dumping fuel into the crankcase.

Excuse my question...I'm cheap...what can I say?

Haulin_in_Dixie

All of the big fleets used to burn the old oil. The ruleof thumb was that you could put 10% in safely. Normally an expensive seperator was installed as I did. The law looks at it the same as burning off road diesel and is a no-no. I can say this, if it is bad for the engine to put ATF in the tank to clean the injectors, than the same would apply for the used oil which has the same detergents in it. I will also warn you of something else here, if you have ever had the tank open for the gage replacement you will know what I am talking about. If you put it in, make sure you put it in before filling the tank. the pickup is sort of in a tank within the tank and the fill is also. If you put two gallons in the tank you will have the subtank full of oil. Engines don't like that, my old detroit would knock badly when too much was put in. Running oil will run the engine hotter and a little better power and economy. Your choice, I don't run it with these new systems and if they check your fuel, it cannot be red or black and with oil in it it looks like dirty engine oil, real nasty. Ran it for many years.

Lightman

Umm, how can I be subtle about this.... I think thats the dumbest thing I've EVER heard. What do you think you're gaining by dumping dirty oil in your tank? Your truck is meant to run on diesel fuel, not dirty oil. The possible problems of clogged injectors, pumps, etc, and the abrasive wear on your engine due to the particles in your oil, can only hurt your engine..let alone the acid content of used oil etc. Also, used oil in your tank will increase pollution and emissions a lot. You will incrementally lose performance, because used oil isn't a fuel meant to be burned, its a lube, actually meant NOT to be burned. I dont believe for a SECOND you will have ANY benefit in power or mpg... :

Take it to discount auto parts, or your local dump, they do take old oil for free, and this is the responsible thing to do with your old oil.

Haulin_in_Dixie

[quote author=Lightman link=board=8;threadid=19146;start=0#msg180812 date=1062732014]
Umm, how can I be subtle about this.... I think thats the dumbest thing I've EVER heard. What do you think you're gaining by dumping dirty oil in your tank? Your truck is meant to run on diesel fuel, not dirty oil. The possible problems of clogged injectors, pumps, etc, and the abrasive wear on your engine due to the particles in your oil, can only hurt your engine..let alone the acid content of used oil etc. Also, used oil in your tank will increase pollution and emissions a lot. You will incrementally lose performance, because used oil isn't a fuel meant to be burned, its a lube, actually meant NOT to be burned. I dont believe for a SECOND you will have ANY benefit in power or mpg... :

Take it to discount auto parts, or your local dump, they do take old oil for free, and this is the responsible thing to do with your old oil.


[/quote]

Yep thats me, jus a big dumb ole irresponsible red neck Actually I view dumping vegitable oil in the tank about the same, oh well

Lightman

[quote author=Haulin in Dixie link=board=8;threadid=19146;start=0#msg180830 date=1062733134]
[quote author=Lightman link=board=8;threadid=19146;start=0#msg180812 date=1062732014]
Umm, how can I be subtle about this.... I think thats the dumbest thing I've EVER heard. What do you think you're gaining by dumping dirty oil in your tank? Your truck is meant to run on diesel fuel, not dirty oil. The possible problems of clogged injectors, pumps, etc, and the abrasive wear on your engine due to the particles in your oil, can only hurt your engine..let alone the acid content of used oil etc. Also, used oil in your tank will increase pollution and emissions a lot. You will incrementally lose performance, because used oil isn't a fuel meant to be burned, its a lube, actually meant NOT to be burned. I dont believe for a SECOND you will have ANY benefit in power or mpg... :

Take it to discount auto parts, or your local dump, they do take old oil for free, and this is the responsible thing to do with your old oil.


[/quote]

Yep thats me, jus a big dumb ole irresponsible red neck Actually I view dumping vegitable oil in the tank about the same, oh well
[/quote]

Haulin in Dixie - glad you are sharing this declaration with us about being a dumb redneck, thanks! My post was clearly a reply to the original poster, oh was this YOUR thread? PS I agree about running vegetable oil in your tank - its bad for the injection system, and has to be heated to the proper viscosity to be burned, requiring a separate vegetable oil tank, a switch to start and stop the engine on normal fuel, and heaters for proper viscostity. What a pain. SVO is also stupid in my opinion. I get the sense that you don't know the difference, and are asserting that biodiesel is the same thing. Read up my friend :

On the other hand, biodiesel requires no modifications to run properly, and is not the same as running vegetable oil..

Haulin_in_Dixie

[quote author=Lightman link=board=8;threadid=19146;start=0#msg180856 date=1062737338]
[quote author=Haulin in Dixie link=board=8;threadid=19146;start=0#msg180830 date=1062733134]
[quote author=Lightman link=board=8;threadid=19146;start=0#msg180812 date=1062732014]
Umm, how can I be subtle about this.... I think thats the dumbest thing I've EVER heard. What do you think you're gaining by dumping dirty oil in your tank? Your truck is meant to run on diesel fuel, not dirty oil. The possible problems of clogged injectors, pumps, etc, and the abrasive wear on your engine due to the particles in your oil, can only hurt your engine..let alone the acid content of used oil etc. Also, used oil in your tank will increase pollution and emissions a lot. You will incrementally lose performance, because used oil isn't a fuel meant to be burned, its a lube, actually meant NOT to be burned. I dont believe for a SECOND you will have ANY benefit in power or mpg... :

Take it to discount auto parts, or your local dump, they do take old oil for free, and this is the responsible thing to do with your old oil.


[/quote]

Yep thats me, jus a big dumb ole irresponsible red neck Actually I view dumping vegitable oil in the tank about the same, oh well
[/quote]

Haulin in Dixie - glad you are sharing this declaration with us about being a dumb redneck, thanks! My post was clearly a reply to the original poster, oh was this YOUR thread? PS I agree about running vegetable oil in your tank - its bad for the injection system, and has to be heated to the proper viscosity to be burned, requiring a separate vegetable oil tank, a switch to start and stop the engine on normal fuel, and heaters for proper viscostity. What a pain. SVO is also stupid in my opinion. I get the sense that you don't know the difference, and are asserting that biodiesel is the same thing. Read up my friend :

On the other hand, biodiesel requires no modifications to run properly, and is not the same as running vegetable oil..
[/quote]

In the interest of keeping Jack's board clean and this thread not being shut down I won't bother to comment on your post.

AlpineRAM

One of hte major differences between engines that use the old lube oil as an additive and the others that are built for straight #2 is that the injector tips of the latter get some carbon buildup when running too much old oil.
In marine applications where you have the engine running at WOT for hours this isn't much of a problem, but in our trucks where even the stock engine usually sees below 20% load the problems with the carbon buildup can be bad.
Hence the manual says that if the customer complains about lack of power, rough idle etc it is suggested to take a heavy trailer up a mountain to proprly load the engine and thereby to flash the injectors. Heavier fuel (like engine oil) will have a greater tendency for carbon buildup....

The requirement to use a lubricant if you are using a "dry" fuel like kero does not constitute an endorsement for adding stuff to the standard fuel. Kero will burn closer to the injector and therefore reduce the carbon buildup.

Just my 2c

AlpineRAM

Commatoze

[quote author=Lightman link=board=8;threadid=19146;start=0#msg180812 date=1062732014]
Umm, how can I be subtle about this.... I think thats the dumbest thing I've EVER heard........... [/quote]

Maybe you should have a look here:
http://www.cummins.com/na/pages/en/p...nuineparts.cfm It's the Cummins Centinel oil recycling system that's used on larger Cummins engines. I don't think I need to remind you that "diesel fuel" you're referring to is actually diesel oil.