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Old 08-14-2019, 05:35 AM
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Join Date: Aug 2019
Posts: 5
Fuel Separation Systems

Are fuel separation systems like Fass Fuel System a must install in diesel vehicles like my 2008 Mercedes-Benz M-Class ML 320 CDI? Will it do anything to improve my vehicle's performane?
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Old 08-14-2019, 06:26 AM
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love all animals
Join Date: Nov 2008
Location: bristol,tn
Posts: 5,681
any water separator is a good thing,however make sure enough fuel pressure
we need a 7 mile wide asteroid hit, to save earth from mankind, and it's parasitic ways
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Old 08-14-2019, 10:23 AM
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Join Date: Aug 2009
Location: MN
Posts: 1,200
Fuel Air Separation System

Your fuel system is pressurized from the tank to the injectors. No suction, no air infiltration, no need.
2012 S350 BlueTEC 4Matic
2007 ML 320 CDI
2007 Leisure Travel Serenity
2006 Sprinter 432k
2005 E320 CDI
1998 SLK230 (teal)
1998 SLK230 (silver)
1996 E300D 99k, 30k on WVO
1983 240D, on WVO
1982 300D, on WVO
1983 300CD, on WVO
1986 300SDL 237k, 25k on WVO (Deerslayer)
1991 350SDL 249k, 56k on WVO - Retired to a car spa in Phoenix
1983 380 SEC w/603 diesel, 8k on WVO
1996 E300D 351k, 177k on WVO

2007 ML320 CDI .. / 2005 E320 CDI .../ 1998 SLK 230 .../ 1991 Daihatsu Rocky
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Old 08-14-2019, 04:20 PM
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Join Date: Oct 2012
Posts: 4,909
Not a scam as it includes a water separator. Beyond that I really have my doubts.

Low price to get you in the door but then you have to buy their replacement fuel filter.

The way of the human condition. If you expect to see improvement you can imagine it. I can think of no way this can increase fuel milage unless your old filter is obstructed. I base this on many people claiming a 1-2 mile improvement just by changing out an old fuel filter.
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Old 08-16-2019, 05:44 AM
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Join Date: Oct 2013
Location: New Zealand
Posts: 494
A Cat 1R-0750 (or equivalent large,r finer filter) would be the only worthwhile filter mod IMO, and that's nothing to do with performance, only change intervals and better filtration.
1978 300D, 373,000km 617.912, 711.113 5 speed, 7.5mm superpump, HX30W turbo...not yet legal
1984 240TD>300TD 121,000 miles, *sold*
1977 250 parts car
1977 280> 300D - 500,000km+
1999 Hyundai Lantra 1.6

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Old 08-18-2019, 10:49 PM
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Join Date: Sep 2006
Location: Middle TN
Posts: 3,650
These ain't Dodge Cummins with their horribly under sized and poorly designed fuel systems feeding a $1,000 VP44 before the problems with the VP were fixed.
85SD 240K & stopped counting. 84SD 180,000. Thinking of painting both.
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