biodiesel
 

will bio diesel (sold by gas/ fuel station) work in a powerstroke 7.3. or would the truck need to be modified at all for running it? thanks, dan

Biodiesel will work just fine in your 7.3. Mods are not necessary to run bio in any diesel.

sweet. there is a station near my buddies house that advertises it. not that it will sway me, but will i lose the black smoke? and should i look for anything special? thanks, dan

You will loose the black smoke...it burns cleaner. Wing the truck starting with 5 gallons bio to a tank, then 10 or 15 gallons to the next tank before running it straight or you will work things loose in the tank all at once and clog fuel filters (always carry and extra one just in case).

The question I have involves temperature problems. When running well made Bio, what are the temp restrictions? I know that with standard veggy oil, there are some real problems, you need heaters even in warm weather. What are the cold weather limits on b100 before you have to modify a stock truck?

The solution to cold weather BD use is simple run Bio/Dino blends. The two can be splash mixed, just pump it into your tank.

The cloud point of BioDiesel depends on the source of the oil, for example Soy based BD will cloud at a higher temp than Canola.
Unless you make your own you will not know the oil source so start blending about 40 degrees (B80 or B90) and gradually increase the percentage of Dino as expected temps drop. You can get an idea of cloud point of the fuel you are using by simply putting a sample in your freezer and taking its temp every few minutes untill it starts to cloud or gel.

The problem with running cold VO has to do with coking injectors and rings which will destroy your engine. It is not the same as the clouding/gelling of BD which will go away once everything warms up.

i usually have a spare at the house, so i could just throw it in the truck. and the tank is new 2k miles TOPS. and the rear tank will have to be replaced before anything goes in it. but i will ween the truck onto it still.