My diesel comes out super clean I haven't had anymore soap in my batches, when dry it is clean enough to read the paper through the fuel in a clear glass. My question is what is the octane level of finished biodeisel if it has one. Also how often will I need to change fuel filters after I start putting it in trucks.

I think you're thinking of cetane, not octane.

Cetane is usually quite high for biodiesel, better than diesel by a wide margin. Don't worry about that part.

How often to change filters depends on whether there's anything in your fuel tank that may be getting dissolved/moved around by the biodiesel. Biodiesel is a good solvent, better than diesel fuel, so it'll pick up old gunk- IF you had any. Some of us use old vehicles and never experience any problems with filter clogging.

However, be aware that biodiesel cold-weather performance sucks- it gels at very high temperatures compared to diesel fuel. You probably cant use it 100% in the winter unless you're in a really warm climate. You can test what temp it'll gel at by cooling down a small sample (with a thermometer in it) in the freezer, or in a cup of ice/salt, and looking at what the temperature is when the fuel just barely starts to cloud. That clouding is the beginning of freezing, and it'll clog filters (the clouding is caused by small frozen biodiesel crystals).

Another cause of clouding is inadequate drying, and that can show up at slightly cooler temperatures than you orignally washed at.

What I do to make sure water isn't a problem in my fuel, is that I cool a small sample to about 50F, and loook at it's clarity. It should still pass the 'read the paper' test. If not, most likely the haze is water and you need a bit more drying.

Cold-weather clouding , the kind caused by freezing of biodiesel, usually doesn't show up above 45F,

thanks GM that helps me a lot.