I would not use this for fuel. I did some research on the gulf cost filters when I was looking for an oil bypass system.
The main concern is water. I have heard that if water hits the paper towel filter, the paper can tear. (just like a hand paper towel trying to mop up a water spill.)
I have heard this from a couple of people running oil field eq. These guys said they were OK in low RMP equipment like oil field pumping/compressor units.
I was not too worried about water in an oil bypass system, but I don't think I would run this filter for fuel. I don't know how bad the problem is, just did not want to take a chance. Water in fuel is always a concern & I would not want my filter media collapsing during use. I cannot speak to the filtration levels, did not get that far into it after I heard about the water issue. . . .