I was wondering what the effects would be of running 0.5-1 gallon of mixed weights (5w-30, 30w, 10w-30) NEW motor oil in with a full tank of diesel fuel would be.... i'd imagine it would only HELP lubricity, but I'm wondering if the viscosity would have any ill effects on the injectors and CP3

also all the metal in the oil

metal in the oil? i'm talking about using NEW unused motor oil, with no contamanents.

sorry misunderstood your post.:)

your better off adding a additive.

well, i'm not using it as an additave, i just have extra half used quarts around all the time from where i work, so i was wondering if i could put them to any good use.

My brotherinlaw in wisconsin dumps a quart of used oil in every tank.

New unused extra 1/2's...dunno...I would not suspect it would hurt.

My brotherinlaw in wisconsin dumps a quart of used oil in every tank.
:badidea:

When I was in New Zealand I saw a guy running his Toyota Diesel Van on a mixture of 60W Gear Oil and 10 percent gasoline. He ran the fuel line through an extended portion of coolant line to give it some preheating. Said that it worked really well.

:badidea: :badidea: x2

:badidea:

I guess the Dmax can't take it.
6.2L or 6.5L dosen't hurt any thing.
As far as metal, even new oil has Zink in it.

I was wondering the same thing. I have several quarts of 30w that I will never use. Thought about dumping 1/2 qt to 1 qt per tank full until it was used up. I was about to post the question when I saw this thread. Any knowledgeable input would be appreciated. SPICER

I can't believe all you guys. You would take a chance on causing damage to a very expensive engine just to save a couple of bucks and "use" some leftover lube oil. This is right on par with those who want to save money by dumping used veggie oil with who knows what contaminants in it in the tank to save a couple of bucks. What the heck why don't you really save some big money and just quit changing oil. Afterall the price of oil filters and 10 quarts of Delo 400 will break the bank.

Tell you what - try this on for size--- Maybe the folks who spent a ton of money designing and testing the engines you have know a little something. Maybe when they tell you to use specific fuels and lubricants they may have a real reason.

They actually sell a system for over-the-road diesel tractors that sucks off a little oil constantly. You only change the filter and add oil regularly, it's a constant oil-change.

I can't believe all you guys. You would take a chance on causing damage to a very expensive engine just to save a couple of bucks and "use" some leftover lube oil. This is right on par with those who want to save money by dumping used veggie oil with who knows what contaminants in it in the tank to save a couple of bucks. What the heck why don't you really save some big money and just quit changing oil. Afterall the price of oil filters and 10 quarts of Delo 400 will break the bank.

Tell you what - try this on for size--- Maybe the folks who spent a ton of money designing and testing the engines you have know a little something. Maybe when they tell you to use specific fuels and lubricants they may have a real reason.

I understand that completely; especiall the part about design- lubercation and fuel specifications are written for a reason, and chances are that I, someone who knows a little mechanics, have nowhere near the expereniece or training that the GM engineers do.

I'm not looking to save money really, and I'm mostly concerned with any execess wear on my engine. BUT, that being said, it would be easier to just dump a few quarts a week into my tank instead of having to dispose of them at a waste site or similar, AND the real question is... would adding motor oil (or whatever else is being asked) to diesel fuel be more variation than there are in #2 diesel normall just because of changes in supply sources and variations in manufacturing.

Overall, I question wether 1 quart of motor oil in 25 gallons of diesel wouldnt change the properties of the diesel more than the diesel could vary in quality in the first place from the station.


:rant:

I too have herd of larger diesels having ajustable motor oil to fuel adders.
The smallest ones I have heard of being tractor trailer size to small boat sized.
But these engines would most likey have mechanical injection or a pump on injector set up like med sized detroit diesels.
Not a high pressure common rail.
All I know is I have been dumping used oil into diesels for years and they still run great. No duramax's in the mix.
If you don't want your motor oil, I'll burn it.

I was wondering what the effects would be of running 0.5-1 gallon of mixed weights (5w-30, 30w, 10w-30) NEW motor oil in with a full tank of diesel fuel would be.... i'd imagine it would only HELP lubricity, but I'm wondering if the viscosity would have any ill effects on the injectors and CP3


I would say as long as you filter it to at least 2 micron first, GO FOR IT!

Josh

I wouldn't do it either. I would stick with a lubricity additive and find other uses for the oil. The newer engines of all makes have a much tighter tolerance and run under higher pressures. The viscosity of oil may have some ill effect.

I can't believe all you guys. You would take a chance on causing damage to a very expensive engine just to save a couple of bucks and "use" some leftover lube oil. This is right on par with those who want to save money by dumping used veggie oil with who knows what contaminants in it in the tank to save a couple of bucks. What the heck why don't you really save some big money and just quit changing oil. Afterall the price of oil filters and 10 quarts of Delo 400 will break the bank.

Tell you what - try this on for size--- Maybe the folks who spent a ton of money designing and testing the engines you have know a little something. Maybe when they tell you to use specific fuels and lubricants they may have a real reason.

thanks for the rant...troll

I can't believe all you guys. You would take a chance on causing damage to a very expensive engine just to save a couple of bucks and "use" some leftover lube oil. This is right on par with those who want to save money by dumping used veggie oil with who knows what contaminants in it in the tank to save a couple of bucks. What the heck why don't you really save some big money and just quit changing oil. Afterall the price of oil filters and 10 quarts of Delo 400 will break the bank.

Tell you what - try this on for size--- Maybe the folks who spent a ton of money designing and testing the engines you have know a little something. Maybe when they tell you to use specific fuels and lubricants they may have a real reason.

Some valid points so I wouldn't call it a rant. When someone ask a question there's always a lot of different answers. To those of you who do like to pour ATF, veggie oil, motor oil and other non fuel stuff in your tanks that feed newer technology engines don't cry when your nice engines don't give you the years of dependable service your looking for. Cost too much to fix these engines when something goes wrong. Ask the guys who have had to replace injectors, rails or pumps. They have all felt the sting in the wallet.

Some valid points so I wouldn't call it a rant. When someone ask a question there's always a lot of different answers. To those of you who do like to pour ATF, veggie oil, motor oil and other non fuel stuff in your tanks that feed newer technology engines don't cry when your nice engines don't give you the years of dependable service your looking for. Cost too much to fix these engines when something goes wrong. Ask the guys who have had to replace injectors, rails or pumps. They have all felt the sting in the wallet.

rants are rants, whether they be positive or negative...my point was that he had a whole 1 post on this entire forum and he came in like king turd on crap mountain.

rants are rants, whether they be positive or negative...my point was that he had a whole 1 post on this entire forum and he came in like king turd on crap mountain.

Hate to chirp in on this one but that was my feeling as well.

rants are rants, whether they be positive or negative...my point was that he had a whole 1 post on this entire forum and he came in like king turd on crap mountain.

I agree. I wasn't looking for someone to complain and tell me I'm wrong for wanting to know or to do something, I was just asking for oppinions on what it could do to my engine, which is what the majority of responses were- thank you.

Well guys I have been running about 1 gallon of USED motor oil in every fillup for 6,000 miles now and It seems to be working rather good!!!

JESSE

Some valid points so I wouldn't call it a rant. When someone ask a question there's always a lot of different answers. To those of you who do like to pour ATF, veggie oil, motor oil and other non fuel stuff in your tanks that feed newer technology engines don't cry when your nice engines don't give you the years of dependable service your looking for. Cost too much to fix these engines when something goes wrong. Ask the guys who have had to replace injectors, rails or pumps. They have all felt the sting in the wallet.

Not so sure about that. What about the guys that have had to replace said parts after burning only #2? It is sometimes hard to relate cause and effect, for example, who is to say that burning a little VO, motor oil, or ATF causes any problems? I am not saying that they do or do not, just that it seems that there are many opinions on the subject, and I have not seen too much conclusive proof one way or another.

Not so sure about that. What about the guys that have had to replace said parts after burning only #2? It is sometimes hard to relate cause and effect, for example, who is to say that burning a little VO, motor oil, or ATF causes any problems? I am not saying that they do or do not, just that it seems that there are many opinions on the subject, and I have not seen too much conclusive proof one way or another.

As long as you have "a friend who works for a chevy dealer", you know exactly what you're talking about when it comes to determining exactly what causes what problems ):h):h):h

As long as you have "a friend who works for a chevy dealer", you know exactly what you're talking about when it comes to determining exactly what causes what problems ):h):h):h

True enough...I am sure that, according to my GM dealer, my Predator has already ruined my engine, tranny, driveline, stereo, and probably is responsible for global warming too!

The high presicion parts make this oh so importaint in todays diesels. Would you run diesel fuel in your crank case instead of motor oil? Well that is exactly what your doing in the injection system. It has a crank in the injection pump with pistons and sliding friction surfaces as well as the sliding super high speed needles in the nozzle tips of the injects. Ever heard of a fuel pressure regulator valve (FPRV) going bad, loppy idle and the such? Does any one remember last summer when I drove 2000+ miles on nothing but hydraulic, motor, trans oils and gear lube as a fuel? I still run 30% oils to my diesel in the winter. Motor is quiet as a kitten. It's amazing what a little lube will do for the life of the injects and FPRVs as well (hint, hint). I've run at WOT with the biggest tunes in -9 bellow temp with the pumps off running my fuel mixes with additives in the winter with out a hitch. It doesn't gel like it use to. I can reliably run around in much colder temps with it now. Sure, the fuel gets thick (there are ways around this), but it doesn't gel, plus I'm giving the pump and injects what they need,,,,LUBE. No, it doesn't add any power, but it doesn't take any either (BTUs are the same because that is what diesel comes from). GMCSLEHD said it correct about filtering it down before using it if it's used oil (been doing this for a year and a half now). A hand crank pump with a good fuel filter on the out put side could get you started.;)

Thanks for checking in, Super. I had forgotten about all the fluids you had been running through your Dmax. Thanks for keeping us informed. Keep up the good work.

Hey Super

How many miles do you have on your engine now? Just curious as to how long you've been doing that and if you're a unique exception to that practice.

I guess I'm chicken. I run #2 with proper additives especially until my warranty runs up. I don't want to ever take it in and have the warranty voided because they find residue from running something that is damaging to the system. From what I learned in past experiances and lube classes I've taken is that the faster the part moves the thinner the lubricating oil needs to be depending on the circumstance.

One quart of new motor oil in 30 gal of #2 would be less than 1%. I don't believe there is any way at that low concentration that it could cause any problems.

The keyword there is NEW not USED.

Take off the Cat, oils and gear lube with zinc is going to kill it - this precisely why it was reduced in modern oils in the 'S' grade and why that new 75,000 mile oil catagory was born...

The only problem I see with motor oil in the fuel is that the Zinc will kill your cat if you still have one. Other than that it is an interesting idea.

Everything from "Heck Yeah" to "Hell No!" with equal enthusiasm. I will try to send George Morrison an E-mail and see if he has an opinion. SPICER

No problems in 30,000+miles now. GMCSLEHD is running the same stuff (about 12,000+ miles or a little over a year) as well as a few other diesels around here from my supply. I don't know how it would effect a CAT system. I have an LBZ here that's been running it for about 5,000 miles with no side effects either. All the oils I use, have been used in something or another. No new stuff. No synthetics either (they burn pretty white in higher concentrations). I run Duramaxes, Powerstrokes, and Cummins on it with the only noticable difference being less engine noise. I have a portable compounded pump with triple filter set up to filter it (30 micron, 2 micron carbon, 15 micron water block, all with clear housings). The setup is about 2' high by about 2' wide and about 1' deep and is capable of delivering about 140+psi. I though about possibly making them available in the near future. It's pretty neat.

If you have a converter lose it.
There is a lot of ash in motor oil.

Hey Super Diesel (http://dieselplace.com/forum/member.php?u=3014) any pictures of your filtering set up?

I was told that diesel fuel at any truck stop had used motor oil added to it. Don't know how much, or what it means to a Duramax.

That is how they use to get rid if used motor oil.
Don't know if they still do it, every where.
At a truck stop is dozens of gallons of oil among thousands of gallons of fuel.

Digital camera is out right now. Basicly it is 2 1" clear water pumps hooked up in compound feeding 2 GM smart water filters with 1 containing a 30 micron pleated filter, 1 containing a 2 micron carbon filter, and 1 Golden Rod water block filter. I will be taking a trip over the Thanksgiving week, and I will be running it on this trip as well (the used oil). About 3000 miles I estimate.

Thought I would bring this back up so some could read on how to make a filtering processor. That should say 2 "GE" smart water filters. The clear water pumps I got from a cheap source (H.F. as well as ebay they can be had from). The filters have clear bowls on them to see if there cloged or not (with black motor oil it dosen't help). The trip didn't happen unfortunatly. At any rate, I run it daily and have done so for quite a while now with good success (just my results) and have run it on all my trips in the past couple of years as well. I'll try to get some pics up soon.

Around here they are buying used oil at 15 to 30 cents a gallon. Thats in Bulk.

i ran used tran fluid in my truck for over 100000 miles and never had a problem.it was dino fluid though,not syn.

If you have a converter lose it.
There is a lot of ash in motor oil.
2 stroke oil is formulated to have very little ash.

$1.94/gal is what my diesel fuel costs me after I factor in the used motor oil and gasoline cut into it.

Bringing it back for info.

Super Diesel I was wondering how much you are running of the used oil per tank ????

John