Re: Anybody running biodiesel?
HIGH quality bio diesel is fine... the problem you run into is that to buy high quality isn't really a savings. The only way to get high quality fuel and save money is to make it, which really isn't hard. You will need three things to make high quality bio diesel...
1: veggie oil, I can't speak for your area, but in my area there are several smaller resturants that will gladly give you their used oil, they typically have to pay to have it disposed of, places like McDonald's and other chains aren't as easy to get it from sometimes, but it is worth asking. once you find a place that's willing to give away the oil, you'll need a system to collect it, 55gal drums are cheap and you can get a small crane fairly cheap to easily load them by yourself. Ask the resturant to seperate the oil by what was cooked if possible, you can use mixed cooking oil, but iol that only cooked fries and onions rings is better for fuel than oil that meat was cooked in. Once you have the oil, you'll need to test the PH, a titration test, this will tell you how much of the second substance you need...
2: Lye or caustic soda, readily available is used to neutralize the PH and bond with the fatty solids in order to allow them to settle to the bottom and be drained off.
3: Methanol (Racing fuel) is readily available at race shops and it's also used in industrial settings as an anti freeze.
Now for a summary, I will not go into a how to make bio diesel block of instruction here, but here's the run down, filter the solids out of oil that is as water free as possible, yes you can separate the water out, then run the titration test, you will have bought a chart that will then tell you how much lye to add and how much methanol, mix well and let sit until the remaining fatty solids and lye settle to the bottom of the coned container you bought, then you'll drain that off, it will have to be disposed of or can be made into soap, then you'll water wash the biodiesel, this removes even more contaminates and produces a much better fuel, water washing may need to be done more than once.
When you're all done, after about a week ( most of which is an electric pump circulating the mixture or it settling) you'll have a batch of perfectly good, unclouded, golden biodiesel that will run through your vehicle better then petroleum diesel.
the one thing that high quality biodiesel will mess up on a vehicle is rubber fuel lines and orings, since you have to use methanol to make the good stuff, alcohol of any kind eats rubber, generally this takes betweem 50,000 and 100,000 miles, and when it happens you'll just end up w/ fuel leaks to repair, replace the lines with silicone instead of rubber and it's a non issue.