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#1
10-27-2002, 12:11 PM
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PBS-MOTORWEEK- E500 , Oil Filter
They show the E500 MB and talk about the suspension... works great... but makes me appreciate my 123 .....
"Diesel Content".... About a year ago Pat Goss installed a " bypass oil filter" onto one of G.Gordon Liddy's diesel trucks.. Liddy says he uses 'marine synthetic' in it and changes it and the filter once every 15,000 miles.... He had the dip stick from the diesel with the 15,000 oil for Pat to rub on his hand... it looked as clean as new oil... and they talked about how usually within miles our diesel oil is black.... I am assuming that by " bypass oil filter" they mean it has its own intake and return lines from the oil pan and its own pump in addition to the filter... Which they claim filters to 3 microns... Most oil filters are "bypass oil filters" in the sense that if they get clogged... they bypass the filter so that the engine is still getting oil.. rather than starve it out... Wish the nomenclature could be standardized... Just thought some who do not usually catch this Motorweek might want to catch it for this oil filter article... Greg 
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#2
10-27-2002, 12:29 PM
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A "bypass" filter for fine particle removal (often 1 micron, not three) is a filter that "bypasses" the lubrication system. Oil is delivered to the filter from the high pressure side of the oil pump through a restriction and returned to the sump.
Interestingly, the OM615/617 has a bypass filter already -- the "main filter" is the plastic screen on top of the filter. Oil goes through the cartridge filter back into the pan through a restriction. Hmmm. Makes me want to check that screen a lot more carefully next time I change oil! These systems can be very effective and can actually remove some of the soot. Very clean oil, though, is usually from a gas engine. A filter fine enough to remove the bulk of the soot in diesel oil wouldn't allow enough oil through to be useful. The newer the diesel design, though, the less soot in the oil. Peter
__________________
1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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#3
10-27-2002, 01:25 PM
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My example was from a Diesel though... Liddy's diesel truck with this system... which I think might ought to be referred to as " an independant,remote,self powered oil filtration system" ....
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#4
10-27-2002, 02:03 PM
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someone here before mentioned a great site about bypass oil filtration, OilGuard.com. while they are a direct seller of their own products, they do have quite a bit of information regarding oil filtration standards:
http://www.oilguard.com/side_menu/bypass_filtration/soot_removal.php http://www.oilguard.com/side_menu/oil/oil_analysis.php also check Amsoil's site: http://www.amsoil.com/products/bf.html
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#5
10-27-2002, 10:34 PM
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I just had to chime in because I live in Owings Mills about 2 miles from PBS. I see them all the time at the local raceway, 75/80 Dragway. Pat is a super nice guy and Craig has the best replica AC Cobra I have seen.
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#6
10-28-2002, 04:45 PM
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It is my opinion that if you filter down to the 1 to 3 micron range, you will be filtering out the additives that the oil company puts in to help protect your engine.
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'82 300SD 206K  miles Anthracite Grey received 250,000 Km badge'93 GMC Turbo Diesel 1-Ton Dually 113K miles Stolen 17 Jul 05  2005 GMC 2500HD Crew Cab D-max 22K miles Love it! '68 Corvair Monza 110 Coupe 26K Sold '66 Corvair Monza 110 Convertible 123K '52 Ford 8N Sold '66 Ford 3000 Diesel (204 hours) For Sale  '86 White 2-65 MFWD Iseki Diesel
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#7
10-28-2002, 07:16 PM
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I have an oilguard system installed on my '02 turbodiesel jetta. Oil analysis proves that they don't remove the additive packages in the oil, and they remove/reduce the wear metals, water, and contaminants from the oil, thus theoretically extending the oil drain interval, or maintaining the same interval with much cleaner oil. These bypass systems don't require their own pump as previously suggested. They just tap into the oil feed, usually with a T at the oil pressure sending unit, and usually tap a return line to the valve cover, or oil sump, sometimes with a hollow drain plug, although I have mine tapped in the valve cover. If you have the room and mechanical know how, I'd highly recommend installing one. They are super easy to install if you have a spin-on type oil filter. Amsoil makes a dual remote mount with adapter that spins into the factory oil filter mount, and has lines already hooked up and a mounting plate. They are sweet if you have the room. they can be found at www.amsoil.com, and www.oilguard.com
Search the fuels/lubricants forum on the tdiclub.com forums, and there are numerous pics of bypass filter installs.
__________________
2004 Ram 2500 Cummins HO 2000 Jetta TDI 1999 E300 (sold)
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