I've got used but filtered oil from my last oil change sitting in the garage. Anyone see harm in putting it in the tank? It would be about 1:35 mixture. I know it's only about $4.50 worth of fuel I'm replacing, but IF it doesn't hurt anything...why not? I got the idea from the thread where the military runs used motor oil in their hummers. Only thing I'm missing is the fancy machine that filters and blends the oil with diesel.

My question would be beyond the optic having to put on bi-focals....how about all that carbon/soot mixture inside the injection pump. As delicate as these pumps are, sounds like an expensive gamble.

What say you Tex?

A light blend of motoroil in a mechanical pump would be fine, but used oil even with such low quantities could very well cloud the optic sensor's lenses. What did you filter the oil with? I can pretty much guarantee you that it will still turn your fuel filter black and the carbon will stain the insides of the filter base and pump.

You might get away with it, but if you don't then you'll be spending a lot more to fix it again than you would be saving in fuel costs.

I don't think the optic will mind if it doesn't get too dark. Have you tried mixing a gallon or two of diesel or kero and the oil and letting it settle out? You may find that the soot will drop to the bottom overnight and make it possible to get the oil into the fuel and leave the soot behind. As far as enviromental responsability, I 'd say the impact will be negligable as long as your getting a proper burn (fuel atomization, boost, compression).

If it were fresh oil or a mechanical IP, I'd say go for it. But used oil in an electronic pump I think might be asking for trouble.

The filter I used is no more high tech than a clean cotton rag inside a funnel. Optic sensor aside, I was thinking the soot was a good thing- more hydrocarbons= higher btu's = more power. If it was a 6.2 with the mechanical pump, the oil would already be in the tank. This is probably one of those penny wise pound foolish ideas.

On another note, I noticed that Costco sells soybean oil in 35 lb containers. Anybody know how many lbs per gallon on soybean oil? Trying to figure out cost per gallon. Maybe worth buying by the pallet. No filtering, cleaning etc.

Can you tell me where the thread is about the military running used motor oil in the hummers? Someone told me that the miltary uses mostly kerosene instead of diesel, that may be why they put the oil in as a lubritive - but i don't know for sure if this is true.
Paul

On another note, I noticed that Costco sells soybean oil in 35 lb containers. Anybody know how many lbs per gallon on soybean oil? Trying to figure out cost per gallon. Maybe worth buying by the pallet. No filtering, cleaning etc.
That is probably 5 gallons. It is slightly lighter than water which would be 40 Lbs per 5 gallons.
How much do they sell it for?

:duh: I can't remember the price. :Wedgie:

I drove a Hummer in the Army and we never used an used oil mixture or kerosene. I believe we used JP1 or JP2 for fuel. We did use kerosene in our kerosene heaters and sometimes generator gas.:secret: :eek:

JP-8 more likely.

There are oil recovery systems used on 'big' trucks, there's a Mack system I've seen that carries an extra reservoir of fresh oil that it feeds into the crankcase over several thousand miles, and puts the overflow from the crank into the fuel to be burnt off.
Saves money on oil changes and disposal, just change the oil filter every so often and fill the reservoir.

:duh: I can't remember the price. :Wedgie:
This is the best I could find on www.samsclub.com:

BAKERS CHEFS
SOY/VEGETABLE OIL 35 LB
Item: 126590
Price: $13.89

If it is 5 gallons, that works out to be around $2.78/gallon. Not really worth the trouble.

I drove a Hummer in the Army and we never used an used oil mixture or kerosene. I believe we used JP1 or JP2 for fuel. We did use kerosene in our kerosene heaters and sometimes generator gas.:secret: :eek:

Not sure about the army but in the air force wqe use JP-8 in everything. If it has a diesel engine JP-8 gets put in it. i havent seen a piece of MO-Gas equipment in about 6 years. they have all gottne phased out.

JP-8 more likely.

There are oil recovery systems used on 'big' trucks, there's a Mack system I've seen that carries an extra reservoir of fresh oil that it feeds into the crankcase over several thousand miles, and puts the overflow from the crank into the fuel to be burnt off.
Saves money on oil changes and disposal, just change the oil filter every so often and fill the reservoir.

We have some BIG mobile Air conditioners and they run 6V92TA detroits and they have the external resivoir as well. they have been designed to run non stop for aircraft cooling. the have external fuel hook ups since it only had 128 gal onboard tanks. (which at 3/4 load only lasts about 8 hours!!!)

This is the best I could find on www.samsclub.com: (http://www.samsclub.com:)

BAKERS CHEFS
SOY/VEGETABLE OIL 35 LB
Item: 126590
Price: $13.89

If it is 5 gallons, that works out to be around $2.78/gallon. Not really worth the trouble.

If I can run straight soybean oil, I'd save about $12 per fillup (40 gallons). You're right, not worth the trouble from an economic perspective (yet).
Although, it is cheaper and I'd rather send my money to a US farmer than an oil profiteer. I think I might buy 8 jugs of the stuff.

Here is a link I have posted in the past that is about using waste oil in the US Army 6.2/6.5's.

http://www.almc.army.mil/alog/issues/NovDec03/Blending_Used_Oil_Vehicle.htm

The US Army uses JP8 which is a very dry diesel kinda like #1 so thyat they don't have any issues with gelling because of that the 6.2/6.5's have hardened injection pump parts due to the lack of lube in JP8.

I have been thinking about adding one gallon of used oil to a tank of fuel 34 gal at that blend I doubt it would hurt anything, but I might add a larger prefilter than my Racor 445 say a 645 and may switch from 30 micron element to a 10 micron element.

Carey

If I can run straight soybean oil, I'd save about $12 per fillup (40 gallons). You're right, not worth the trouble from an economic perspective (yet).
Although, it is cheaper and I'd rather send my money to a US farmer than an oil profiteer. I think I might buy 8 jugs of the stuff.
I agree. It's nice to know we have a viable option if diesel prices ever got too crazy - we're sort of hedged at $2.78 per gallon with soy bean oil.

I was wondering about bulk vegetable oil prices at Sam's club - thanks for researching that and figuring out the cost per gallon.

Nice to have alternative fuel options like that - another great benefit of diesels! Gassers don't have any alternatives. At least none that are easy to come by.

Although, it is cheaper and I'd rather send my money to a US farmer than an oil profiteer. I think I might buy 8 jugs of the stuff.
I like your thinking. For that, it is worth a trip to Sam's. Online there was a lot of veggie oil, and most of it was more expensive, so you might want to check back at your local store.

used this setup on ground power equip. never had problems but was mech. inj. was mounted on dolly would recirc. fuel tank and blend in, watched filter bowls running 30m filters. and change to 10m after removing as much. system not cheap but could find most parts on ebay. http://www.parker.com/EAD/displayCatalog.asp?menu_parkerid=46&menu_gid=3&menu_divid=109&catid=9819&subcatid=12195&catdesc=MARINE%20RECYCLERS&viewtype=1&sMode=Details

And they wonder why the Hummers are having problems in Iraq.

I have a bypass filter on my truck that goes down to 1 micron and I still am not going to put used oil in the tank (yes, I did think long and hard about it). Soot is sub-micron size and if anyone has ever gotten used oil on your skin or a shirt, you know how bad it stains. I'd be afraid for my optic sensor.

What is the lens of the optic sensor made of? Would a fuel additive injector cleaner clean it up after the fact? If you read some of these bottles, these new additives will practicly rebuild your IP:rolleyes:

Not sure about the army but in the air force wqe use JP-8 in everything. If it has a diesel engine JP-8 gets put in it. i havent seen a piece of MO-Gas equipment in about 6 years. they have all gottne phased out.

I knew it was JP something. Yeah we also phased out MO-Gas equipment after the first gulf war. We went to the quiet reliable diesel generators with the new Moble Subscriber Equipment.:)

well filtered motor oil is still on hold. However, I was at costco and bought 5 /35lb containers of soybean oil. Put one in the tank tonight. Runs fine (about 15-20% blend right now). I think I'll add another in the morning.