I'm wondering if anyone has any input on the possibility of mixing JP8 into B100 to help lower the pour / cloud point. I know that JP8 is similar to #1 diesel (which is sometimes mixed with #2 diesel to lower the pour point). Also JP8 is said to lack the lubricity needed in Cummins engines, but B100 has the lubricity to make up for it.

Also, I've read about mixing used motor oil in the reactor when making up a batch of biodiesel to help lower the cloud point. Might this same idea work but using JP8 instead of used motor oil?

The weather here in MT only allows me to run B100 a couple months of the year, then I have to start adding #2 to keep the fuel flowing. I may know someone who has access to waste JP8. I'd like to burn more biodiesel if at all possible.

Thanks for any replies.
David

 

I asked this question a year ago with the following results supplied by bomber members and a bit research:

a) JP 8 is not Diesel No.1 or similar
b) JP 8 has a different chemical structure which can kill your IP quickly due to the complete lack of lubricants.
It's also known to behave aggressive to pump seals.

It is used as an emergency fuel in the military with the adding of 2-stroke oil!
A military Bombers member explained that Hummvees fueled by JP8 are killed quickly.Thanks again for that info!

I think it's not worth the risk even with B100 supply. Remember those fuel cleaners, they also work in a small percentage compared with fuel- so does JP8.

Hope that helps.

 

Thanks for the advice. Do you recommend staying away from it completely? Would there be much chance of harm to my VP44 if I used it in small quantities - lets say 1oz JP8 per gallon of B100?

 

As I have written already, even a small percentage is not good at all.
I love my IP as I found out replacement is very expensive.
I personal stay away from it (even if i would love to use it, due to the slight higher energy content. It would be like a premium fuel)
You shouldn't risk it.

Just remember what effects injector cleaner in that small quantities does.( It's just an example). It is in the fuel in very small quantities and it still cleans up the complete fuel system.
Don't risk your pump!

 

JP-8 is formulated with icing inhibitor, corrosion inhibitors, lubricants, and antistatic agents, and less benzene (a carcinogen) and less n-hexane (a neurotoxin) than JP-4. It just doesn't have a lubricity specification, so running pure JP8 in an injection pump/injected diesel would probably be unwise due to the potential for not enough lubricity.

But for cutting B100, the most lubriscious diesel fuel available today, that would not be any issue at all. In the ratios you mention it would have negligable if any effect on the fuel's HFRR rating.

 

The diesel piston engines may be different but in the Abrams Tanks we ran JP8. They are multi-fuel engines and CAN run diesel fuel! However we ran JP8 because its cleaner and lengthens the service interval on the power pack. Consequently you CANT use the smoke generator though with JP8... The generator dumps raw fuel into the exhaust.... Not a good idea with jet fuel.

However, i wouldn't run JP8 in my truck... Isn't it stupid expensive anyway?

 

Just exactly what is this "waste" JP8? Like DieselWeasle said it's expensive, used mostly by the Navy or maritime environments due to the lower flash point and subsequently less fire hazard.

 

the reason the military has a tendancy of using JP8 is often time simplisity because all of our equipment get run on it. the problem with JP8 is the lack of lubricants in it aslo be extremely careful jp8 mixed with diesel has a tendancy to jel up if left sitting. I would never put JP8 in any of my diesels after seeing what it does to our diesel equipment at work. I know we have been slowly getting away from the JP8 in the SeaBees because of the effects on some of the more expensive pieces that were not designed for it.

As for you running a VP44 pump I would even more so say stay away from the JP8 the VP44 pumps are tempermental enough about lubricants in them with out trying this.

 

No, none whatsoever.

 

where are you guys findin' jp8 available in the civvie world. most military vehicles are ran off of jp8. from the fmtvs to the hets to the heavy equipment. our older 5 tons, the 900 series trucks, all have the cummins engines in them. i was told by two motor sergeants that it was ok for the engines, but i personally have very little experience digging into the engines. they seemed to run fine. and the million or so miles the company put on them in the sandbox didnt seem to hurt them either. is jp8 cut with regular no. 2?