Typical Micron Ratings for Car Fuel Filters

[TC]

I posted this data below in a different thread about gas station fuel pump filters. It occurred to me that it could warrant its own dedicated post on vehicle fuel filter efficiencies.

Typical Baldwin gas station pump fuel filters:
50% @ 5-20 microns
98.7% @ 25-45 microns

To my surprise, those fuel dispenser numbers above aren't that different from automotive fuel injected fuel filters, which I assumed would be finer.

2002 Toyota Land Cruiser
Wix 33526
50% @ 10 m

2001 BMW 750i
Wix 33228
50% @ 12 m

2000 Mazda Miata
Wix 33538
50% @ 20 m

 

[TC]

Some specs for CARBURETOR fuel filters. I expected these to be significantly lesser filtering than for fuel injected rides....but not so much.

1980 Dodge Ramcharger
Wix 33054
50% @ 11 m

1974 AMC Matador
Wix 33032
50% @ 20 m

1983 Oldsmobile Delta 88
Wix 33052
50% @ 25 m

But here's confirmation that, as expected, carburetor engines don't require the higher level of filtration that fine-mist fuel injection does, although cleaner is of course better.

1962 Chevy Corvair
Wix 33050 (sintered bronze)
50% @ 40 m

1971 Ford Pinto
Wix 33027
50% @ 50 m

1969 Mercury Montego
Wix 33046
50% @ 80 m

 

[fantastic]

Yeah, from what I gather high fuel pressures & dirt will cause a lot of damage to the fuel system. Thanks for the comparisons.

 

[TC]

1969 Mercury Montego
Wix 33046
50% @ 80 m

That 80 micron number is the largest I recall seeing amongst a large sampling of Wix fuel filters. For reference, 80 microns is roughly the thickness of a human hair, and also coincidentally about the smallest object the human eye can see.