Ok I'm going to be the skeptic.
Biodiesel must be mixed with gasoline for it to run in a gasoline engine. BWFuel is candid about this, stating "Bioweapon is refined partly from poultry biproducts". Most homebrew biofuel producers usually try between 5% and 15% biodiesel to pump gas. It's still quite experimental... the point being, you can't run straight bio fuel in a gasoline engine like you can in diesel engines. The Biodiesel simply is an add-on, much like Ethanol.
Here's why I'm playing the skeptic. The proces for making biodiesel is essentially free - there's a LOT of people doing it at home nowadays. You can take biodiesel and add it to normal pump gas, and you arrive at a cleaner burning, cooler running mixture. Sounds great.
But I'm thinking economics here. It doesn't really cost you any more than pump gas and time to make a biodiesel gas additive.
In the end, it's actually cheaper for you to make and run bio-gas than it is to run pump gas, because you're mixing 15% or so of a "free" product which costs nothing to produce in to normal gasoline. This means if pump gas costs you $2.60 a gallon, once you mix the biodiesel in, you're only paying $2.21 for the end product because 15% of the end result didn't cost you anything other than some time to wash and filter, and some trips to the local grocer to harvest used chicken fat from their rotisserie...
So you take $2.60 pump gas, mix in 15% biodiesel that's brewed in your basement, and you have a product that costs you $2.21 a gallon. It *is* a great product but the laws prohibit you to sell it to other people to use on-road, because you're not licensed. So you turn around and sell it for $6.00 a gallon to offroad guys, pocketing $3.79 a gallon.
It's smart. Not only does the stuff run cooler, but you effectively boost the octane a bit so it runs a lot like race fuel. And pocket quite a chunk of change in the meantime. It's possible to crank out as much as 500 gallons of biodiesel a week, working alone.
While some may be interested in trying some out, they should be asking some questions about your base bio additive mix, basically to determine and ensure it's within spec, rather than risk an engine on an unknown factor.
You've got to think, a bad 15% mix of biodiesel that's out of spec with pump gas can utterly destroy a spark ignition engine, and some of the built race engines on the track cost a LOT of money. The final octane rating will vary widely with the quality of the additive, the concentration of the additive, and the techniques used to filter and wash the biodiesel - right down to temperatures the mixture is kept at in key points.
Think about what would happen to a highly tuned engine if the octane were reduced below 87.. cylinder detonation, etc..
So here goes:
What tests have you sent your biodiesel additive in for?
Do you have the lab reports available for inspection?
What is the ester and methanol content (% mass)?
What standards do you meet or exceed? EN 14214, ASTM D-6751, etc?
What's the specific density of the bio fuel additive you produce?
What is the ratio of bio diesel to gasoline?
What is the base gasoline you use in your mix? (Both specific brand and octane please)
What's the flashpoint?
What is your liability insurance limits, coverage (which states), and what is your warranty to consumers if your product damages their engines?
Thank you in advance.
