Posted by LJD on November 13, 2011 at 11:23:36 from (67.142.130.11):
In Reply to: Diesel Fuel Additive posted by wolfman on November 12, 2011 at 17:25:04:
Here are a few specs for lube additives and what seems to be the best buy - which in my area is gallon jugs of Walmart two-stroke-oil.
Diesel fuel and other fluids are tested for lubricating ability using a device called a “High Frequency Reciprocating Rig” or HFRR. The HFRR is currently the Internationally accepted, standardized method to evaluate fluids for lubricating ability.
It uses a ball bearing that reciprocates or moves back and forth on a metal surface at a very high frequency for a duration of 90 minutes. The machine does this while the ball bearing and metal surface are immersed in the test fluid (in this case, treated diesel fuel). At the end of the test the ball bearing is examined under a microscope and the “wear scar” on the ball bearing is measured in microns. The larger the wear scar, the poorer the lubricating ability of the fluid.
The U.S. standard for diesel fuel says a commercially available diesel fuel should produce a wear scar of no greater than 520 microns. The Engine Manufacturers Association had requested a standard of a wear scar no greater than 460 microns. That is also what Stanadyne recommends for many rotary distributor injection pumps.
Southwest Research Laboratory did a test on types of lube additives.
Walmart Super Tech Outboard 2-cycle TC-W3 engine oil (Not ULSD compliant, may damage 2007 or newer systems) HFRR 474, 162 micron improvement when added at a 200:1 ratio
Stanadyne Lubricity Formula HFRR 479, 157 micron improvement Added at a 1000:1 ratio
Amsoil Diesel Concentrate Multi-purpose HFRR 488, 148 micron improvement Added at a 640:1 ratio
Power Service Diesel Kleen + Cetane Boost HFRR 575, 61 micron improvement when added at a 400:1 ratio
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