Exstending Cummins engine life?

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I've decided to routinely add oil to my diesel fuel, since it has almost zero lubricity now days. I can add 8 oz of 2 cycle oil or use a motor oil I have no dpf filter to clog up so should be a safe practice what do you guys think ? is 8 oz to say 75 gallon enough or to much I can get wally 2 cycle oil in an 8 oz bottle for about a buck each....
 
Recommend the ashless 2-cycle oil. For 75 gallons, you need a lot more than 8-oz's; I'd be using 20 to 24 if it was my vehicle.
 
Originally Posted By: 147_Grain
Recommend the ashless 2-cycle oil. For 75 gallons, you need a lot more than 8-oz's; I'd be using 20 to 24 if it was my vehicle.

I think the way I will approach this is ill keep upping by 8 oz increments if needed to get the diesel fuel to leave a very fine coating of oil after it evaporates. Right now as fuel stands ican drench the out side of a tank and with in no time it looks like nothing was ever on the tank...
 
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Back in the day on the farm if you had fuel present on the out side of a tank you could see as much as 1/4 in of dust build up on the spilled area of the tank...
 
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That's a very, very good observation, and one that I'd missed entirely...even petrol (gas) used to attract the dust on leaking fuel lines.
 
Originally Posted By: Rob_Roy
Skip the oil and use a real fuel conditioner, that way you get lubricity AND detergency.


And cetane improvers, and CPP suppressents, etc, etc ...


2-stroke oil has been tested and proves to be a good lubricity agent, but it has NOT been tested as to any detriments is may cause (excess soot and/or oxididation build up in the fuel delivery system).


Use a product specifically targeted to the task and leave the decades-old shade-tree stuff to the old IDI tractors.
 
But at what cost?
Please give me some product names?
If your talking lucas or power service or howes your talking much higher cost such as 2.00 vs.20.00 to 29.00 per treatment ....
frown.gif
 
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I've been using Power Service fuel treatment for 9 years. I pay $13 for a jug that treats 300 gallons, or the equivalent of 10 fill-ups. That's $1.30 per fill-up, and I only treat the fuel every 2nd or 3rd time. So that's $1.30 spent every 1200 or 1800 miles. I drive the truck on the average 17,500 miles per year, so it's costing me only about $19 per year for fuel treatment.
 
Originally Posted By: 2hellandback
I've decided to routinely add oil to my diesel fuel, since it has almost zero lubricity now days. I can add 8 oz of 2 cycle oil or use a motor oil I have no dpf filter to clog up so should be a safe practice what do you guys think ? is 8 oz to say 75 gallon enough or to much I can get wally 2 cycle oil in an 8 oz bottle for about a buck each....


So a couple of comments:
1) How do you know the diesel fuel you use has almost no lubricant?
2) What injector pump, electrical or mechanical like a VP44?
3) The rate normally used is 1 oz/gallon.

I get the TCW oil at Wallmart by the gallon.
 
Originally Posted By: A_Harman
I've been using Power Service fuel treatment for 9 years. I pay $13 for a jug that treats 300 gallons, or the equivalent of 10 fill-ups. That's $1.30 per fill-up, and I only treat the fuel every 2nd or 3rd time. So that's $1.30 spent every 1200 or 1800 miles. I drive the truck on the average 17,500 miles per year, so it's costing me only about $19 per year for fuel treatment.


Well according to this website

http://planetsafelubricants.com/planetsafe-test-results/hfrr-comparison-tests.html

Power Service fuel treatment does not add enough lubricity to pass the US gov. standard of 465 (or below) in the HFRR test. That assumes the diesel fuel had no lubricity when you got it out of the pump. Mostly likely it had some, but maybe not enough.
 
You should be running 2 stroke oil at a ratio closer to 1oz per gallon. You cannot over do it, your engine will run on straight 2 stroke oil just fine. Anything less than that really isn't enough to do much good to anything. Other products that claim to be diesel fuel lubricants aren't very good either, they cost more and you mix them at a much leaner ratio. Part of the reason for this is that the additives sold for diesel fuel must also follow the ULSD rules. 2 stroke oil is not EPA approved for your engine. That doesn't mean that it won't work spectacularly!

There are ZERO negatives to adding a high amount of 2 stroke oil to your fuel. I always use a mixture of Diesel Kleen and 2 stroke oil with my diesel. Diesel Kleen claims to be a lubricant, but it makes a very poor lubricant compared to 2 stroke oil. It is a good cleaner and cetane improver however.
 
Originally Posted By: Donald
couple of comments:
1) How do you know the diesel fuel you use has almost no lubricant?


That is the definition of ULSD. If your engine was manufactured prior to 2007, your engine was designed for a different lubricity spec than currently available by law. The EPA doesn't care if you have to spend 3 grand on new injectors.

They're supposed to add some lubricant back in at the pump, but sometimes they do, sometimes they don't. I'm not going to take the chance.
 
Originally Posted By: Number21
Originally Posted By: Donald
couple of comments:
1) How do you know the diesel fuel you use has almost no lubricant?


That is the definition of ULSD. If your engine was manufactured prior to 2007, your engine was designed for a different lubricity spec than currently available by law. The EPA doesn't care if you have to spend 3 grand on new injectors.

They're supposed to add some lubricant back in at the pump, but sometimes they do, sometimes they don't. I'm not going to take the chance.


The diesel oil at the pump should meet 465 (or lower) on the HFRR test. Even ULSD. More than sulfur can be a lubricant.
 
Originally Posted By: Donald
Originally Posted By: A_Harman
I've been using Power Service fuel treatment for 9 years. I pay $13 for a jug that treats 300 gallons, or the equivalent of 10 fill-ups. That's $1.30 per fill-up, and I only treat the fuel every 2nd or 3rd time. So that's $1.30 spent every 1200 or 1800 miles. I drive the truck on the average 17,500 miles per year, so it's costing me only about $19 per year for fuel treatment.


Well according to this website

http://planetsafelubricants.com/planetsafe-test-results/hfrr-comparison-tests.html

Power Service fuel treatment does not add enough lubricity to pass the US gov. standard of 465 (or below) in the HFRR test. That assumes the diesel fuel had no lubricity when you got it out of the pump. Mostly likely it had some, but maybe not enough.


Thanks for the link. It's made me do some checking, and I find that I'm using the wrong Power Service fuel treatment most of the time. I'm using the stuff in the white jug (Fuel Supplement), which is for temperatures below 30F. It doesn't have lubricity improver. I should be using the stuff in the silver jug (Diesel Kleen) above 30F.

The chart on Planet Safe's website shows that SuperTech TC-W3 does pretty well. I wonder what effect two-stroke oil has on cetane.

And of course, Planet Safe's additives are the best, according to that chart. However, I would like to see some independent test results not done in the company lab before I hang my hat on their results.

But anyway, I've been using the wrong stuff for 9 years and 157k miles, and the truck is still running fine. ULSD came out in 2007, and I've put 120k on the truck since then, yet it continues to run.

I think your concern is unfounded. ULSD has to comply with the wear test requirement of ASTM D975, and comes with lubricity additive from the fuel terminal. What you get out of the fuel pump at the gas station should be safe to run in your engine.
 
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Originally Posted By: krismoriah72
http://www.johnfjensen.com/Diesel_fuel_additive_test.pdf


This is an interesting link. The test was conducted in 2007. They used all of the same additives that Planet Safe quoted on their web page. Were the two studies related, or did Planet Safe just add their results to the original Arlen Spicer study?

Edit: Looking closely at the results of the Arlen Spicer study, there was another additive that was tested that even beat the Planet Safe additives:
1) 2% REG SoyPower bio-diesel
HFRR 221, 415 micron improvement.
50:1 ratio of baseline fuel to 100% biodiesel
66.56 oz. of 100% biodiesel per 26 gallons of diesel fuel

So does this mean that if you just run B2 biodiesel, you can forget all about additives?

I wonder why Planet Safe forgot to post this factoid on their webpage.
 
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