Interesting comment on diesel fuel and injection pumps...
#16
Re:Interesting comment on diesel fuel and injection pumps...
I don't have proof or references at my fingertips, but I remember reading that there are "secondary" issues with using two-stroke oil. Unwanted deposits on injectors, if I recall correctly...<br>I believe Chevron has a web site that addresses this issue, or look at the FAQ's on the Cummins page.<br>Stanadyne lubricity formula costs me only ~3 cents per treated gallon; it's designed specifically for this purpose and is one of the best for lubricity, if not the best. They don't advertise an MPG gain, but I think there is one, so true cost per gallon is probably even lower.
#18
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Re:Interesting comment on diesel fuel and injection pumps...
Raften: Fuel injectet gassers do not inject directly into the cylinder- meaning that the injector stays cool. The Diesel's injector will get very hot, so oil will burn up on the tip. Modern 2 stroke oils are formulated to burn ashless (or as close as possible) and complete for environmental reasons (over here of course)<br>We had good success in doting low sulfur diesel with about 10-20% of biodiesel. This increased lubricity and raised cetane about 3 points. This stuff burns clean and can be used up to 100% to fuel the Cummins (my personal experience from running it). It has about 10% less energy per gallon, resulting in a very slight drop in fuel mileage which is sometimes more than compensated by the effectively earlier timing caused by the higher cetane number.<br><br>Just my 2c<br><br>AlpineRAM
#19
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Re:Interesting comment on diesel fuel and injection pumps...
I wouldn't worry too much about use of 2-stroke oil in the relatively low percentages being discussed here - some individuals, and large trucking outfits will burn FAR greater percentages of used motor oil in their engines mixed into the fuel, with no apparent problems.
And, something not covered as to increased lubricity, is that while most of OUR concern is related more directly to the injector pump and injectors, the same added lubricity that provides THOSE with additional protection and reduced wear, will ALSO provide additional protection and longer life to cylinders, rings and other related parts as well... ;D ;D ;D
And, something not covered as to increased lubricity, is that while most of OUR concern is related more directly to the injector pump and injectors, the same added lubricity that provides THOSE with additional protection and reduced wear, will ALSO provide additional protection and longer life to cylinders, rings and other related parts as well... ;D ;D ;D
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Re:Interesting comment on diesel fuel and injection pumps...
Gentlemen -<br><br>Not to confuse this issue, but most all GOOD two-stroke oils are synthetic, and designed to mix and burn completely with little or no deposits. (carbon) I race vintage mx on my two stroke husky & penton. I pull the engines apart twice a season, with no signs of deposit. I would imangine it burns the same way in a diesel. Though I have never used it in my truck, I think I will give it a try if it can help the pump, (#2) to survive. I don't know if the outboard two stroke stuff is formulated the same way or not, but guess it would be to prevent fouling & smoking.
#22
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Re:Interesting comment on diesel fuel and injection pumps...
(From another related thread, in case some are interested)<br><br>I was sorta curious about the Power Service stuff, since I've been a long-time user of their "Fuel Supplement" - and some guys prefer their "Diesel Kleen" formula - both are the same price locally at Walmart.<br><br>I sent PS a question as to what the difference actually is between the 2 formulas, since the labels claim pretty much the same qualities for both products - their response was that the fuel supplement was better in colder climates where fuel jelling might be a problem, and the diesel kleen would be better in warmer climates, since it added more cetane boost - both formulas contain the same percentages of added lubricity...<br><br>Looks like I'll be switching to the diesel kleen stuff next jugfull... ;D ;D ;D
#23
Re:Interesting comment on diesel fuel and injection pumps...
I just put Stanadyne in my truck and I LOST FP. What's the deal? I used to get a solid 16.6-18 (depending on temp) at idle. Now I'm lucky to get 16. Ever since I went on a road trip, I've gotten less FP. Maybe it's time for a new filter?
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Re:Interesting comment on diesel fuel and injection pumps...
[quote author=BigBlue link=board=8;threadid=14654;start=15#138306 date=1052971747]<br>I just put Stanadyne in my truck and I LOST FP. What's the deal? I used to get a solid 16.6-18 (depending on temp) at idle. Now I'm lucky to get 16. Ever since I went on a road trip, I've gotten less FP. Maybe it's time for a new filter?<br>[/quote]<br><br>I don't think it was the Stanadyne... I have never seen a drop in FP from anything but my bad lift pump...
#25
Re:Interesting comment on diesel fuel and injection pumps...
I've got a Holley Black on mine. Not worried bout it ;D. I've been over and around and through that pump so many times that if it does break, I can fix it. I think I'll change the filter and see what happens. The weather has also been warmer so I'm wondering if the diesel isn't getting a tad bit thinner.
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Re:Interesting comment on diesel fuel and injection pumps...
Might be the Holley. I've heard the Bushings go bad on 'em.<br><br>Maybe it's another brand pump ?<br><br>Merrick Cummings Jr
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Re:Interesting comment on diesel fuel and injection pumps...
[quote author=FMF MX link=board=8;threadid=14654;start=15#138102 date=1052937841]<br>Gentlemen -<br><br>Not to confuse this issue, but most all GOOD two-stroke oils are synthetic, and designed to mix and burn completely with little or no deposits. (carbon) I race vintage mx on my two stroke husky & penton. I pull the engines apart twice a season, with no signs of deposit. I would imangine it burns the same way in a diesel. Though I have never used it in my truck, I think I will give it a try if it can help the pump, (#2) to survive. I don't know if the outboard two stroke stuff is formulated the same way or not, but guess it would be to prevent fouling & smoking. <br>[/quote]<br><br>Don't remember all the details, but marine 2 cycle is different. Husqvarna warns that marine oil will void their warranty.
#28
Re:Interesting comment on diesel fuel and injection pumps...
[quote author=MCummings link=board=8;threadid=14654;start=15#138325 date=1052976163]<br>Might be the Holley. I've heard the Bushings go bad on 'em.<br><br>Maybe it's another brand pump ?<br><br>Merrick Cummings Jr<br>[/quote]<br><br>Nah. It's a Holley for sure. I'm going to change the filter and see if that helps. I'm wondering if the air temp has anything to do with it. Since it's much warmer now (in the 90's), the fuel might be thinner. I know I have higher pressure when I first fire it up in the morning. If the bushings go bad, I'm sending it back to Holley or something and getting it worked on. They know I've had problems with it.
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Re:Interesting comment on diesel fuel and injection pumps...
I find this a very interesting thread.. and it makes a lot of since with the lower sulfur content/lower lubricity.. I run PS each tank in the winter and usually every other tank in the summer.. I may go to every tank now though..<br><br>BUT doesnt Dodge/Cummins say you shouldnt use/dont need an additive UNLESS it is a winterizer thru cummins..<br><br><br>What are your thoughts on warranty issues??
#30
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Re:Interesting comment on diesel fuel and injection pumps...
[quote author=thatguy link=board=8;threadid=14654;start=#138480 date=1053013837]
I find this a very interesting thread.. and it makes a lot of since with the lower sulfur content/lower lubricity.. I run PS each tank in the winter and usually every other tank in the summer.. I may go to every tank now though..
BUT doesnt Dodge/Cummins say you shouldnt use/dont need an additive UNLESS it is a winterizer thru cummins..
What are your thoughts on warranty issues??
[/quote]
1. The "fuel experts" insist that the lack of sulphur in the fuel isn't the problem, it's the PROCESS used by refiners to REDUCE the sulphur that creates reduced lubricity - yeah, I know, it's a fine line, but one we should be aware of, because all refiners apparently don't use the same refining process, so the degree of lost lubricity can be different from one refiner to another. I always cringe when some well-meaning owner who THINKS he is doing the right thing, states he uses a lubricity additive "sometimes", or "every other tankful" - that's like playing russian roulette - how can you know WHICH tankfull really NEEDS the added lubricity? It's like only using a condom "every other time"... ;D
2. Cummins might not admit that we "need" a lubricity additive - but they ALSO won't publicly admit that the VP-44 is failing at an excessive rate, either - all for liability reasons - if they DID state the need for additional lubrication, OR the excessive failure rate of untreated pumps. it puts the responsibility and liability issue right at their front door - they aren't ABOUT to do that - but I think you'll find the vast majority of injection pump repair and service agents WILL recommend added lubricant formulas for virtually ALL types of pumps used on the Cummins, NOT just the VP-44!
3. I seriously doubt there is the SLIGHTEST potential warranty issue, as long as the instructions as to percentages of additives is followed within reason. I absolutely feel far safer WITH added lubricity than without it, and certainly plan to continue its use.
I find this a very interesting thread.. and it makes a lot of since with the lower sulfur content/lower lubricity.. I run PS each tank in the winter and usually every other tank in the summer.. I may go to every tank now though..
BUT doesnt Dodge/Cummins say you shouldnt use/dont need an additive UNLESS it is a winterizer thru cummins..
What are your thoughts on warranty issues??
[/quote]
1. The "fuel experts" insist that the lack of sulphur in the fuel isn't the problem, it's the PROCESS used by refiners to REDUCE the sulphur that creates reduced lubricity - yeah, I know, it's a fine line, but one we should be aware of, because all refiners apparently don't use the same refining process, so the degree of lost lubricity can be different from one refiner to another. I always cringe when some well-meaning owner who THINKS he is doing the right thing, states he uses a lubricity additive "sometimes", or "every other tankful" - that's like playing russian roulette - how can you know WHICH tankfull really NEEDS the added lubricity? It's like only using a condom "every other time"... ;D
2. Cummins might not admit that we "need" a lubricity additive - but they ALSO won't publicly admit that the VP-44 is failing at an excessive rate, either - all for liability reasons - if they DID state the need for additional lubrication, OR the excessive failure rate of untreated pumps. it puts the responsibility and liability issue right at their front door - they aren't ABOUT to do that - but I think you'll find the vast majority of injection pump repair and service agents WILL recommend added lubricant formulas for virtually ALL types of pumps used on the Cummins, NOT just the VP-44!
3. I seriously doubt there is the SLIGHTEST potential warranty issue, as long as the instructions as to percentages of additives is followed within reason. I absolutely feel far safer WITH added lubricity than without it, and certainly plan to continue its use.