Don't forget your "unseen" costs when choosing to make and use biodiesel made from cooking oil.
- What is your peronal time worth? You do have to spend a lot of time doing the work to covert it.
- Cost and time spent traveling around to collect used cooking oil?
- Space to set aside to do the work/conversion - and storage.
- Cost of supplies (those enzyms, and safe disposal of wastes.
- Cost of utilities to run the machine
- Zoning and insurance? It might be against local building codes and your home-owners insurance might be affected.
- Vehicle warrenty problems using home-made biodiesel?
And don't forget the problems with all those stray cats chasing you around after you convert a batch of cooking oil from the local fish-n-chips joint!
They said 2500L duty free? Well, here in the US, most States have something similar. They have a "road use tax" applied to every gallon of fuel sold in their State - so many cents per gallon. The rate varies per State. Generally, it has been pretty much ignored. But now some States are cracking down on it, and handing some people a hefty "tax" bill! They've started with some of the prominant advocates - especially after some did TV/newspaper interviews talking about how much extra "cheap" it is because you don't have to pay those road-use taxes added in at the pump! Some State tax men took that kind of personal, so they "enforced" the collection of that tax.
It's a good concept, especially if you have more "time than money". Just be careful of those "hidden costs".
Mikey - yee ol' grumpy blacksmith out in the Hinterlands