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I know a lot of guys who run basically a heated cover over there fuel lines to keep them from gelling. On the new trucks it seams to be ok from what I read, but it can eat the seals out of injector pumps on the older trucks.
Something about it does not agree with the older seals, and gaskets. I dont know if it affects our trucks past gelling to soon. I had nothing but trouble with my truck gelling over last year while I was at work. Took me an hour one night to get my truck started a couple nights.
Towards the end of winter I found out the gas station I frequented was selling bio diesel. I switched my gas station, and less problems with it.
I've never had an "issue" with pump fuel around here (New Jersey). Even in the winter when we get temps below 10*f. I try (try being key word) to keep my fuel stabilized with some sort of Power Services product (usually diesel Kleen and additionally their winter stuff in the winter).
I didn't think diesel went bad either but I'm just going to assune it does for the longevity of my truck. I had a quart container with some diesel I drained from the fuel filter out of my Jetta tdi. That too smelled varnish-like and I know when I drained it out of the filter it didn't smell that way. It smelled like diesel fuel. This has been in the container, covered for a few months.
Either way my truck will need a new or repaired fuel tank. I'm not looking forward to dropping the tank. Hopefully i can clean the tank and repair it. My budget is in the negative right now and fuel tank is last on the list since my rear tank is not leaking (yet).
As far as I am aware they manufacture four different types of diesel fuel for vehicle use. #1 diesel, #2 diesel, bio diesel, and JP8. The last one I have never seen for sale, but it is what the military uses. Depending on which one you get depends on its gelling temp.
some places switch between #1, and #2 diesel depending on the time of the year as #2 I believe it is gels over at a higher temp.
I know you can get them to run on other things as well, but those are the main four that I know to exist in wide use.
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