2018 Duramax fuel filter in use for 14,000 miles

wwillson

Staff member
Messages
3,120
Location
Naperville, IL
The filters always come out with this black coating. The new filter has white filter media. I wonder of the gasoline we put in our cars is as dirty as diesel fuel?

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Last edited:
Messages
1,978
Location
North Carolina
The main issue here in the states is fuel quality. It stinks for the most part. Big oil can do way better but then it would cut into their profits. Sad.
 
Messages
2,138
Location
Ottumwa, Iowa
Refining isn’t a pure process and then their is the mill scale and dirt from the millions on miles of carbon pipe and tanks that is it pumped through. If you could take all the dirt out of that filter and put it in a pile it wouldn’t be as much as you think for the amount fuel you ran.

Gasoline is somewhat cleaner because of the refining process but also doesn’t require as fine of filtering as Diesel engines do.

Bio diesel tends to be a bit dirtier also. Bacterial growth is also an issue that makes a huge black mess.
 
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