Since the previous owner of my truck had a bad batch of diesel with fungus in it, I continue his practice of running anti-fungal treatment most tanks of fuel. I still see evidence of that stuff here and there, on my fuel filter and on the pre-heater strainer. And this past weekend I dropped the fuel tank on my truck, and found a partially clogged filter and strainer on the fuel sending unit. Some of that stuff was most definitely old hardened fungus, and some was residual glycerine from running BioDiesel most of the time, and I suspect there were some food/fryer particles and crud from a bad batch of BioDiesel I got a year ago.
I soaked the fuel sending unit filters overnight in SeaFoam, and it did absolutely squat for cleaning up those filters. I will never, ever use SeaFoam as a fuel system cleaner since it doesn't work.
What did work was soaking in carb cleaner, and finally in straight methanol.
Interestingly the tank was pretty clean inside, no doubt to running BioDiesel. That stuff cleans very well. I think I just had residual crud from the bad BD, and the older bad batch of dino diesel.
My truck is so much quieter when running BioDiesel. And I will say that it's much more pleasant working on the truck when the smell of the fuel is BioDiesel versus DinoDiesel. And I was up to my elbows in the stuff for a good portion of the weekend.
I have run other fuel additives and the truck runs smoother and quieter and seems to have more power with the additives such as Power Service, Liqui Moly Diesel Purge, etc. These days I don't use them, other than the anti-fungus stuff.
GulDam
I soaked the fuel sending unit filters overnight in SeaFoam, and it did absolutely squat for cleaning up those filters. I will never, ever use SeaFoam as a fuel system cleaner since it doesn't work.
What did work was soaking in carb cleaner, and finally in straight methanol.
Interestingly the tank was pretty clean inside, no doubt to running BioDiesel. That stuff cleans very well. I think I just had residual crud from the bad BD, and the older bad batch of dino diesel.
My truck is so much quieter when running BioDiesel. And I will say that it's much more pleasant working on the truck when the smell of the fuel is BioDiesel versus DinoDiesel. And I was up to my elbows in the stuff for a good portion of the weekend.
I have run other fuel additives and the truck runs smoother and quieter and seems to have more power with the additives such as Power Service, Liqui Moly Diesel Purge, etc. These days I don't use them, other than the anti-fungus stuff.
GulDam