I have brewed up a sizable test batch of what I hope is biodiesel! The PH and specific gravity checks out. What sort of final filtration or treatment is recommended before pouring into my 81 VW diesel tank? I've heated a sample of my final product and it appears to bubble and fizz at about 220-250 degrees. Is this normal? Is this residual water or methanol? Should I boil my biodiesel before use to remove residual methanol? I'd like to avoid the washing if possible. What's the alternative to removing any soap? Thanks for anyone's two cents on this....l

I think the general feeling is that after several days settling, biodiesel is clean enough to put straight into your fuel tank as long as you do NOT draw your BD from the bottom of the settling tank. There seems to be a general agreement on the forum that an additional cheap see-thru fuel filter prior to the main filter is a good investment.

Be aware also that many people have reported fuel filters quickly clogging up for the first little bit as the biodiesel cleans out the crud from the tank.

Are you talking 200 deg F or C? Almost all the excess methanol will be out of the BD at around 95 deg c. After that temp you are still able to drive off more methanol mixed with a little water for quite a few deg more, but it comes out very slowly.
If you are not going to wash your BD You can either heat to remove methanol or just let it "Breathe" in a container that is not sealed tight for a few days. I do not think you want to boil your BD. Getting it too hot will damage it so I have discovered.

The alternative to removing soap is to leave it in. (washing V not washing).

Tilly SBC/IBA Paradise

"...but when you come to Heritage USA, remember to bring your Bible and your VISA card - because the Bible is the Holy Truth, and God doesn't take American Express."

Appreciate sharing your experience with final stages of Biodiesel prep.§ l

Hi Rayholan

Stick it in your tank and enjoy.

Tell everyone you meet that you are running your Vdub on homemade BioDiesel and watch their reaction.

No need to let it breath, I done that once with a good red wine and it made no noticeable difference whatsoever.

Sticking with the red wind theme,
You should always lay your wine down, I find laying it on the floor of the car on the way home from the bottle shop is long enough.
Always let the wine breath after removing the cork,
Or for those impatient people like me start using mouth to mouth as soon as possible.

Regards
Dhill

ive been using unwashed biodiesel in my car and bus conversion for around 9 months, and have not had a problem , let it settle for awhile, dont waste your time washing it just filter and put it in the tank and enjoy, ive done around 10,000 klm in my mazda turbo b2200 ute and havnt even replaced the rubber fuel lines which still look fine, cheers dan

let settle two days, then filter 5 micron-see yellowbiodiesel.com no probs, and dont heat past 180f or you will make mono glycerides, which darken and thicken the oil.
bosch injectors dont rewally care though.