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Maintenance & Fluids Discuss products, techniques, intervals, and fluids for maintaining your GM truck including oil and oil additives, fuel and fuel additives, alternative fuels (Bio-D, SVO, WVO), filters, grease, and maintenance specific tools.

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Old 08-27-2007, 12:54 PM   #71 (permalink)
mtbullock
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Quote:
Originally Posted by SixPak;1965509;
It is interesting how well this product, Opti-Lube XPD, tested. But, since the product is not yet available on the open market, AND the tested sample came direct from the manufacturer, I would be a little suspicious of it at this point. That, and the cost don't make it that attractive, even if it were readily available. Just my .02. YMMV.

Did someone slip us a 'mickey' ??
I talked to Jim at Opti-Lube this morning. The Opti-Lube XPD formula that was used in the test is supposed to be available for sale by the end of this week. (Jim said Friday morning.) They will also be updating their website for this product.

mtb

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Old 08-27-2007, 01:09 PM   #72 (permalink)
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Quote:
Originally Posted by RayMich;1965529;
I am also surprised that Stanadyne's Performance Formula didn't do any better that 33 micron improvement for lubricity.

I think that the lubricating properties in Performance Formula were OK with the old 500 ppm LSD fuel, but ULSD fuel is really dry and I don't think they changed their formula.

However, keep in mind that Performance Formula has other major benefits besides lubricity:
  • Wax Modifier / Pour Point Depressant
  • Wax Dispersant
  • Alcohol-Free
  • Freeze Depressant
  • Deposit Modifier
  • Detergent
  • Lubricant
  • Corrosion Inhibitor
  • Water DEMULSIFIER
  • Anti-Oxidant
  • Cetane Improver
Although lubricity is very important, these other benefits are very important to me as well. So I will continue using their Performance Formula. I'm going to start using their Lubricity Formula along with Performance Formula. I figure with both combined, I should be in good shape. I can cut back a little on the Performance Formula to balance out the dose of Lubricity Formula.
I'm with you. I am running Stanadyne Performance Formula right now, and will be adding either a small amount of 2-stroke, or some Stanadyne Lubricity Formula to make it better. The rest of the properties of the Performance Formula are very desirable to have, IMO. Also, I would never run an additive that emulsifies the water in the system, which is partly why I chose Stanadyne to start with. Great work on the study!

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Old 08-27-2007, 02:11 PM   #73 (permalink)
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Even if the lubricity benefit of bio maxes at 2%, I'm still going to run higher if its available. Less money going to the Arab nations.
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Old 08-27-2007, 03:56 PM   #74 (permalink)
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Good points from RayMich and Tutts
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Old 08-27-2007, 04:17 PM   #75 (permalink)
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Quote:
Originally Posted by Unit453;1966531;
Here's the complete PDF file in case anyone wants to see it like the air filter study...
Thanks Nick.
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Old 08-27-2007, 04:48 PM   #76 (permalink)
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Thanks Spicer for all your hard work. The results were very surprising. I know it would have been cost prohibitive, as well as un-controllable, to also test with pump diesel. The reason I say this is because perhaps these additives "react" with additized diesel to enhance lubricity. Just thinking out loud, thanks again.
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Old 08-27-2007, 05:01 PM   #77 (permalink)
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Nick, thanks for the upload of the .pdf file.
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Old 08-27-2007, 05:04 PM   #78 (permalink)
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SPICER,

Here is a question for the experts at Southwest Research.

Since many lubricity enhancers do so by plating onto the metal being protected, is it possible that letting the test parts "SOAK" for a period of time, could have improved the protection and therefore, yielded a smaller HFRR scar and better test results?
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Old 08-27-2007, 06:23 PM   #79 (permalink)
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Ray, I have sent you an E-mail regarding a necessary change. The 2% biodiesel heading needs to be changed to read "2% REG SoyPower biodiesel". This is to give credit to the sponsor and to name the exact brand of biodiesel used in the study. This was my fault not catching this sooner.

As far as soak time, the chemicals used to plate the surface are called "surface reactive" chemicals. As far as I know they are constantly being scuffed off and replaced on the surfaces as the fuel sloshes around. Being surface rective to me implies instant chemical bonding. SPICER
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Old 08-27-2007, 06:28 PM   #80 (permalink)
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Thanks Spicer. Great info.

Looks like I'll start dumping in a little extra Stanadyne Lubricity Formula per fill up. Hopefully that will improve HFFR score.

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