Originally Posted by nodakbassmaster
Hey guys, what temp does #2 fuel start to gel at? Thanks!
Level 1 - "Cold Filter Plug Point"
This is the point at which there is enough solid waxes bound togather in the diesel to be caught by the filters. There not be enough for you to really "see" yet, but they are being trapped by the filter. If the fuel remains this temprature long enough and if enough fuel flows through the filter, it will become plugged, even though the fuel may look "clear".
As the fuel gets colder and colder, more of these waxes bond together to form bigger and bigger "polymer bonds" of waxes.
Level 2 - "Cloud point"
This is the point at which the fuel looks "Cloudy" to the "naked" eye. There is enough of these polymer bonded waxes to form large enough chains to be visible. It will abviously stop up filters here.
Level 3 - "Gel Point"
This is the point at which there are is an “infinite polymer network”. The point at which the fuel starts to be a solid or semi-solid due to these polymer bonds. The fuel will not flow at this point.
Cold filter plug point/Cloud point is anywhere from 20*F - 40*F depending on water and contaminates in your fuel.
Gel point is around +5* give or take a few degree.
Biodiesels are more prone to Cold filter plug point/cloud point/gel point. They can plug faster, they absorb water more redably. The Bio part can seperate out of suspension in ULSD more prone than LSD. Can not explain why just know it does.
Remember we have a fuel filter heater so we should be protected at temps lower than stated but I'am not going to venture into that for liability issues.