Hey Guys,
I've got the 6. 7 and the soot levels in the oil just can't be good for this motor. For the folks using the bypass filters, I'd appreciate any feedback. If you do oil analysis, is your bypass filter keeping the soot levels down?
Once and for all: Does the bypass change the color of the oil back towards amber?
What bypass did you install and picutures of where you put it would be great.
Thanks much.
RiverRunner
According to the (SAE) Society Of Automotive Engineers paper 881825, AC Spark Plug and Detroit Diesel Corp. performed a joint study of the relationship between the level of engine oil filtration and Engine wear rates, and found finer filtration reduced the rate of Engine wear.
Diesel and Gasoline Engine wear rates were established by building a Diesel and Gasoline Engine with fully inspected wear components and inspecting them after the test. In both Engines, the upper and lower main bearings, oil rings and compression rings were inspected. In the Diesel Engine, the cam lobe profile and cylinders were also inspected, while the piston pin bushings, piston pins and cylinder liners of the Gasoline engine were inspected.
The total test duration was eight hours. To accelerate wear, 50 grams of AC Fine Test Dust was added, in slurry form, to the crank case every hour.
Diesel Engine wear tests were performed using filters with high efficiency ratings for particle sizes: 40 Microns, 8. 5 Microns and 7 Microns.
Gasoline Engines wear tests were performed using filters with high efficiency ratings for particle sizes of the following sizes: 40 Microns, 30 Microns and 15 Microns.
ANALYSIS
The researchers found clearances in the Diesel and Gasoline Engines varied between
2 and 22 Microns during engine operations. That means particles in the 2 to 22 Micron size range are most likely to damage Engine parts. Particles smaller than 2 Microns will slip through the clearances without damaging bearing surfaces.
CONLUSIONS
The researchers drew the following conclusions:
Abrasive Engine wear can be substantially reduced with an increase in single pass efficiency. Compared to a 40-Micron filter, Engine wear was reduced by 50 percent with 30-Micron filtration. Likewise, wear was reduced by 70 percent with 15-Micron filtration.
Controlling the abrasive contaminants in the range of 2 to 22 Microns in the lube oil is necessary for controlling Engine wear, and “The Micron rating of a filter as established in a single pass efficiency type test, does an excellent job indicating the filter’s ability to remove abrasive particles in the Engine lube oil system.
The smallest particles most popular “full Flow” filters capture with high efficiency are sized 25 to 40 Microns, depending on the filter brand.
I utilize the Asmoil "By-Pass system" (BMK-11 and EaBP-100 Filter element) and do oil analysis every 10,000 miles. My last analysis with just over 60,000 miles on the oil and just under 5 years (Aug 2007) reported
0. 76 percent SOOT/SOLIDS.
Is the oil "BLACK"?
Yes it is black, and it has been black for the last 55,000 miles! The first 5,000 miles on the oil with the by-pass the color of the oil was pretty clear, but as I said it has turned black since.
The "Color" of oil is not necessarily an indicator of how good the oil is.
Used Oil analysis is the best indicator of serviceability.
Wayne
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