Former VWDieselParts.com Forum

Is it necessary to check WVO for free fatty acids? I am currently running B100 in a 85 Jetta and in a Merc.240D. I have found lots of veggie oil that has too much acidity to use for Bio. Is this oil usable in a greasecar?

thanks

Concerns re: high levels of Free Fatty Acids aren't relevant to the running of a properly designed Waste Vegetable Oil system. They are only relevant when you are making your own biodiesel fuel.

Excuse me if you're already clear on this, but B100 is 100% biodiesel, not 100% un-transesterified veggie oil.

If you're running a WVO system, and have sufficient hot filtering of the oil to say 10 microns or less onboard just before it hits the injection pump in an oldschool VW, FFA is an acronym you can let go up in smoke.

Thanks Josh,

I have been making and running B100 and I am considering switching one of the cars to a heated WVO system just to make some obsevations and comparisons. I have been getting my oil from several sources and the FFA is too high to make good BIO from about half of my sources so I thought....why not try a WVO system?
Any one with other thoughts?

I think it's going to be an issue if you are getting wvo from sources that use crappy oil, shortening, leaving it the fryer for months or letting it sit with water and other crap in it. Once i started only getting my waste oil from places that only used canola, but more importantly changed it often and didn't wait for 6 months before getting it picked up , made all the difference. I stopped even checking for FFA's because it wasn't even an issue any more.

caveman,

Thanks, I did find that the best oil came from folks who would call me for a pickup just after they drained the fryer and before they dumped the oil into the hopper.